Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f80f832d4df1ec…

MALICIOUS

PDF

80.8 KB Created: 2021-09-20 12:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d22f6a03c090ef61c2c5b34d800da1a3 SHA-1: 6b7014823c60e2b259f7e7e59bd7506269429a5a SHA-256: d7f80f832d4df1ec8123e8a9d90868e6ab064cd5e72e725038f71436c396733f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and a link farm on potentially disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ec7143742---wenujifegedutibinupab.pdf In PDF document text
    • http://irths.com/upload_files/files/52356687870.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/1934980569.pdfIn PDF document text
    • http://ceroki.com/image/files/fevolufabofako.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/14513720515.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/lovutaliwibepemutujuzef.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/60264526377.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/64879874237.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16147c5c7bebc2---55281066856.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/23601183702.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/lituvo.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/vamowil.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/tezoferusoworaxofuvowame.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356adc9cd4b---wajibuviwavasibapeguleda.pdfIn PDF document text
    • https://hockeymro.ca/docs/file/zofusapimimarajinelibubu.pdfIn PDF document text
    • http://armanetti.com/images/vabevijotofasulibativoda.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136b43659ebd---17612065287.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/fajazadujoxi.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/66189207488.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/setaxilinitabuwibo.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/gurerewunijigapaxepi.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/xonatuxebevepakonuru.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/wuvebavijotepuwen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=conjuring+3+full+movie+download+in+englishPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD649 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 11288 bytes
SHA-256: 483508599797409a3a2b0adcfbc6d9b30bdea66aabbe0c75c72457ad8c2bd1a3
font_02_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 17364 bytes
SHA-256: 36068521e8df9a0c3426e6022d387ecc6472fede2025037f2c77989ea3c64ca7

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