Malicious PDF — malware analysis report

Static analysis result for SHA-256 566d6df9df7dbd8c…

MALICIOUS

PDF

94.8 KB Created: 2021-07-17 09:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 03261970457ccb1072157830ac260cc3 SHA-1: ce9cf21d60dd181cd93bb18f091855b72f80b1bd SHA-256: 566d6df9df7dbd8cc4c54003d9ce4f1749c9f1472bd1f0508729b2b671e44e93
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it contains a link farm pointing to compromised WordPress uploads and a raw IP address, suggesting it's part of a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this, indicating the PDF is likely intended to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/37beec03ce31f91f47f3289cbbe886ca/85236374269.pdf In PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/904ddafba72ff432041eb060e43604a4/38403839506.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6e13b8e73---xiridutilebuwa.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/34045787913.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/wisowamimitanafame.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0fd6c4a0b---97775940125.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a683b92f9b4---20819706908.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c084c0e094a---jeburidosifu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16083faa4b5998---46781126505.pdfPDF link annotation
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608942402ebe3---rovapubikakur.pdfIn PDF document text
    • https://bdata.vn/upload/files/pixibagodeze.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf067edd1---86453292183.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/magezekanowerej.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37f525e822---48933117366.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/wuzebowalapubeta.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089213ea9768---rewamesimukopif.pdfIn PDF document text
    • http://flirdining.com/uploads/files/jizoxexif.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/32585804352.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/mu332t7c9tjg4p5uicsgr4i6m4/xasuk.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/ributapopiwogimirumu.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/pilidobovipazorerobilitu.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa2ceaf508---varozatofipipuf.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e835e249c6---nowaruxunepezetabazovi.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/62208198923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=convert+exe+to+pdf+online+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 10360 bytes
SHA-256: aa74bff2b3686c04d278334152183738a79cb76fdd91f06fc6f1cab33c3dec27
font_01_sfnt_off00010e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12619 16484 bytes
SHA-256: ff57e0476ba9147cef6e3a379b1fc481ddd0c633dd4977ddb783b62f7fabb516
font_03_sfnt_off00013cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC2 18232 bytes
SHA-256: 7ad384bee80e59a9349274091dacfa405ddf52498126df628a4e4f48fe7a4b1a

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