Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d1973d46eb982c…

MALICIOUS

PDF

81.2 KB Created: 2021-09-11 07:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 00aa20edaf48c6e6576327bdb0bcda07 SHA-1: 4e72951dd342d4a23e2fa160d929127c7c2055e1 SHA-256: f0d1973d46eb982cc902e7a2bde301daf46a472735d38e32bd8dd4508b3bbfb5
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=smart+led+tv+vs+android+led+tv PDF link annotation
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/14254772053.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/6d9d9501b13d0f87bc5042911f064871/48660699623.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/tasojunixuwesefinoxadul.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/lakujeze.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/8376512579.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/kukolokegufim.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/90146592488.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/jetobusaremesuku.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/34753449319.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/7094651316.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/29185571117.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/63370758769.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/36712050726.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/tevusan.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/1268962477.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/78613518047.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/wedaloxewexedujupekimu.pdfIn PDF document text
    • http://bdsductri.com/upload/files/82704241660.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/sejadoseboselenoledogapak.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/vezosexuwanoropoz.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/16352963709.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/78958924359.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_off0000d94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 10548 bytes
SHA-256: aa07d4e66e9f7be6bbe533ae6d089cc2a8c0217f3f0550d06aa8f57c4aad22f3
font_01_sfnt_off0000f150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10962 17660 bytes
SHA-256: 800d5ad6ffceda5335a8fbf25c3bbe95ae5bedb47901d655d2904e9014c6980a