Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8ab22fe4763cb7…

MALICIOUS

PDF

77.9 KB Created: 2021-06-22 10:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00476be59c0b986144ef6ace935a5b57 SHA-1: 2c0726dc4fe2d572af39ec2c069efbca0869a513 SHA-256: 0f8ab22fe4763cb7e6432c3a58eeb9d33d00aee87cf5c0270db208399a6ba742
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites, suggesting an attempt to distribute malicious content or phish users. The ML classifier strongly indicated maliciousness, and the presence of embedded links and the document body content related to movie downloads supports a lure-based attack pattern. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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=rx+100+telugu+movie+download+hd+jio+rockers
    • http://wintec-samu.hu/uploads/files/19367709264.pdf
    • http://akinmedical.com/uploads/file/baretuledivetetakovubi.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/6ptafabsko626srdrtibefjckr/bujoziwofeba.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ch75a65nk4jmfrel39cfp9ihb6/wuguxan.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42193f737---47766393461.pdf
    • https://dvg.asia/ckfinder/uploadfiles/files/nizojitaxesivaxiresujuzil.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa51782b6f---11818926942.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9e015818c12527c4846cac7a2532d931/79011797853.pdf
    • http://bsa.by/ckfinder/userfiles/files/miregezonerizipulomive.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/7c6b0d7aeb322d7a1c97c279dae8ecd5/mutazif.pdf
    • https://akproauto.net/nbloom/fckuploads/file/40258844471.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608273ebbd025---folifigoxipazi.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/bmju47eb06b5974isseaitcal2/xinifejimafufajogoj.pdf
    • https://sasalidayanisma.org/uploads/file/38024786624.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/6ma02vbh1o5udi1kfes33sk240/busikem.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951ceee1fa8---96612498838.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bad04657fc3---xajipukiketuparodojumonik.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c57796eaf3a57e0c5a0ef66fd072d1c3/vemanupuwube.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a18a10191be---xidemojagireke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e462.bin
259004a7007d7d4a19ef5327ea2f6a3f32416744d50736b2c4a51255a3bbe9a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE462 5796 bytes
font_01_sfnt_off0000f806.bin
acba8075f77130bf56b7ac78157b9f7b61f01f9a24cb47e660fa592049021925
pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 10540 bytes
font_02_sfnt_off00011bf2.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF2 4324 bytes