Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c9d64a9e2bcc21…

MALICIOUS

PDF

74.5 KB Created: 2021-10-06 19:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 96b1040250fb9f85b265f3a577aca460 SHA-1: b755e14eaaa96502116382c933cab97415945931 SHA-256: f9c9d64a9e2bcc210af554e9ebc5037ab92b21db0e45892e2b1eb786da78b419
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or scam campaign. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=torr+to+mmhg+to+atm PDF link annotation
    • http://webinaris.biz/ckfinder/userfiles/publics/files/navewotapegiwusegur.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/90460172647.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/15892080480.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161460e264ec8c---48141395056.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/9c892b56df543621489b0456242b3605/kozisitisi.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/tasuribupobavunuluvu.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc713231da---sodoxabojawunur.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/a5k7v5mv6nohkbtkec54tmigct/7929142856.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/48334493879.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/jumowezedibimixumomewaz.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/95479269429.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/dudotu.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/55637256846.pdfIn PDF document text
    • http://atsolution.org/userfiles/file/20210922201941647998047.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1615ae27f12a0b---85934186065.pdfIn PDF document text
    • https://tdfstore.it/file/safoluzovuberegebuwuku.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d967183d28749f9845d714147ebcd899/48857054508.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4d9990b5b---mavinuperujew.pdfIn PDF document text
    • https://lerivagedesmilleetangs.com/caningest/images/file/jisawobupuvafivuzedosuza.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/bebolirolakowonivow.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/woxozalezemo.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/76986387327.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/73323496934.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/zuzufokoro.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/1939369027.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_off0000bf1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD730 18228 bytes
SHA-256: d0a7d5710d3b3fd4db960a10afce09a1b0036f3651cafef1f32134b315df5d87
font_02_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 9976 bytes
SHA-256: 40d18e77622a35f4cb5e102e2659cc164fd68702e5edf75f5e08bfefaa290fe8

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