Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7095877b610614a…

MALICIOUS

PDF

77.5 KB Created: 2021-09-06 02:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e7b94df5b83e17f7433ba0b0362a2abe SHA-1: 29d04ea0bf5bd8b0cf4337d74e1fe6c61bffad2c SHA-256: c7095877b610614a7ee08929b980454649d8a88fe35335aa0c2f2ce6cf23f390
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://huntic.ru/uplcv?utm_term=sustainable+agriculture+practices+examples+pdf PDF link annotation
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/5a32e0ed62b7798411c3c797afd29234/tadamivesitafusizotavunu.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c17fdaac608---togupawezapetamofivetat.pdfIn PDF document text
    • http://poultech.net/d/files/39712668668.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/90168074343.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160c84fe9f0762---xizotus.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/96954773103.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/7932227531.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/bugorarepur.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/72706007432.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/546ad3153f2e89db81425180b260f1d1/wajuzi.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/suzolufinanolazoma.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/wusubebisasekuz.pdfIn PDF document text
    • https://robertbah.si/files/file/fikegulitij.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103074217905---381779241.pdfIn PDF document text
    • http://mav-auto.ru/images/file/sevotoxan.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/raxoxo.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/44498788116.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/jovoxuwanuji.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd8ce70fc9---xeriza.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/4pt9laa2d2p4t1h84ncr4jk4bm/sagalani.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/20168508709.pdfIn PDF document text
    • https://ottopianos.nl/files/47753067811.pdfIn PDF document text
    • https://beaszemin.com/files/lofovaxogisomapoj.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_off0000cb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB99 16720 bytes
SHA-256: e088190cd3add5536cebd210f177374f6a961705192e7fa5ee66a411ea472dea
font_01_sfnt_off0000f687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF687 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9E 11260 bytes
SHA-256: a85ce01c508c8a9d391089ba30b3cf0137d57d34f38b54cca9948ba33b3737a1

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