Malicious PDF — malware analysis report

Static analysis result for SHA-256 464bad77f6255f0c…

MALICIOUS

PDF

87.3 KB Created: 2021-08-12 03:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e8d1c11e11260b04f8ec85aeb323a538 SHA-1: f15cb1a6ef1d00708bb80878def5d36f6965a784 SHA-256: 464bad77f6255f0ccc0dd08a129e1f146006351ac391e1262bc1add4916c5ebd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5261

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://grupahatak.pl/admin/_fck_files/file/legor.pdf In PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf67062701---mutoved.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073de517d577---55888338327.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/27278000676.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/bed5enk03olro6mbintjmaom75/82382261258.pdfIn PDF document text
    • http://momsystem.ru/public/file/62578714318.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/9b9dc0daf4cb6363960347741a0cc086/kunirumiworesejoluxuvod.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/9d611354e1f12e3c32daeaf852c4b6fd/98435769753.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/xigapo.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/bc677df35633da8ff1cce72442d8dd3e/rujedenuwiwub.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079067b53995---11084210836.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17a4d3728f---45747485217.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/waveverepibume.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1d2eb5e99---kawub.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/387ddb40d9929300bbdb67f6b2235ebc/97473765645.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/bb12698efae09a18d29ac4935db495fc/95187640666.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881ad8725ef---zuguroxutuxazadorimana.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609837bbe003a---29010355650.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/1491275694.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/00r973n57gf4skq5150ddp1o7e/musudosup.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/35rhpek27cfnt84aoechekr21l/59912744919.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/45154021061.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/89663771331.pdfIn PDF document text
    • https://latework.cz/soubory/51595438703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=tamil+new+full+movie+free+download+2019PDF link annotation
    • 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_off0000fcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001150f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150F 16988 bytes
SHA-256: 63ef0350416151b7b6b7150e14d82c1c355f2dd505fb0821876bc9150c0b857d
font_02_sfnt_off00014158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14158 10928 bytes
SHA-256: bc8e3cea3815aee8afa6ad46dbbfc43e1122c1d7176ca341e9c7db2be1aea08e

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