Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29fb31cf66007b7…

MALICIOUS

PDF

71.7 KB Created: 2021-09-01 02:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4a13039fe9ab96e0efaf117eb99321f5 SHA-1: 85d553875f4177db3b502a93be742cc809cff3f2 SHA-256: a29fb31cf66007b7f409987d29008df20c738a98bbb3b03d30a2abeea27d9e79
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://cructi.ru/uplcv?utm_term=logan+likes+mary+anne+read+online PDF link annotation
    • http://princeverma.in/uploads/files/rosulonujatobulafofe.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/93956308607.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/sojugimekagidibonofit.pdfIn PDF document text
    • http://simonide.org/userfiles/file/jotasa.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ade787a4c57a1a9c2a8b59c9737907e/41730404093.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/sixorejatimezuleraw.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160842d8165172---31866305148.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef33579615---88935255246.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/gibefanafepumuv.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/2149b41fc3a20b114cb85111bf921c9e/81017841122.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/a36u4hk79vhedapq19ea48m7h0/15718806406.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/58a06e9f651976a9f91fcc1fe5d1eb68/dipejagureb.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/1binrhm2sj2f3junen02fhie35/lasenojelukuruluruses.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/37036085742.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12228879e8---192163789.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ioce4nofgmu8d2brdp4olui025/nofopujadal.pdfIn PDF document text
    • http://asustainable.com/global/file/wunemoxoxerimimopuwon.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/fodezizofakotefojebu.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/9k4keo01cceb7r332m0ga4njt3/23047034401.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160fd01737e585---87035171381.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9efb2a418---6951322988.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160757709d439a---mazanelinozowazux.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_off0000bb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB00 10656 bytes
SHA-256: c035a598635f6983068f71742fcc5709b695f408c645c2768a84d85165e66892
font_01_sfnt_off0000d324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD324 14760 bytes
SHA-256: b71787acdb7b6f07a75e7a7c81ec7c0b1da1fb4b1b5804e4b845483342f5dacb
font_02_sfnt_off0000f86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.