Malicious PDF — malware analysis report

Static analysis result for SHA-256 0480755ac59d7ba8…

MALICIOUS

PDF

90.2 KB Created: 2021-09-01 05:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ce734e904ad5e8ad1e25a2025034f2db SHA-1: 7e754f30eb855da96d7f9d9b9e00bf1c8fcc2065 SHA-256: 0480755ac59d7ba89925184fa709c99475987eb14c538d04d565c87f6fdd3383
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress upload directories. The presence of a 'download button' lure suggests an attempt to trick the user into clicking a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/uplcv?utm_term=apex+tutorial+for+beginners+pdf PDF link annotation
    • http://sushibelovo.ru/files/sidozaxubafefijudepob.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d353162cd---1474281584.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160d8fc75b212c---woborukananurozevunef.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f65a0073c7b---namitumamamu.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb3c2c8e60---50166081129.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/gabewerofejerujiz.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/17569197223.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/nuvagititunekaj.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161130adf33b3c---79401694992.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609241f16aa4a---33457432135.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/91520417006.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/85727128099.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082a60b0abf3---segufapujujopimininol.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/jbrtapujg4gqpo332c8qs96vft/49256310001.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/pogowamawewojebigudazap.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/kadizavegowatefinosaka.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/wivuzebexiduvevap.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/bisekarajokubukadilojujet.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/gemum.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/42793556409.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22a36d17ac---21209352729.pdfIn PDF document text
    • http://daikinhbac.com/upload/files/wixosinezibexijesopajiwen.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb2c29396c---pemekel.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/26k3uo8qmi4scdtcbhcg9pegg3/raxasesozetoj.pdfIn PDF document text
    • 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_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F70 18928 bytes
SHA-256: b09b8f4a4c00b2b61c5581cda036b6ebc269709cd3cfdfffe7e6ef56225bda9e
font_02_sfnt_off0001412a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412A 10996 bytes
SHA-256: a63d0a6f26206bd9a0666aa9372944042f0cb90e4b9a663e01237fe9deaa11ea

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