Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b70a083e4505318…

MALICIOUS

PDF

65.2 KB Created: 2021-03-05 14:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 80c70716c0781e56bb27c1e0a93f6ad9 SHA-1: dd98969cb6515eb2c91f04f1eb42b958facf0006 SHA-256: 5b70a083e4505318b75e47ef18a360a3c04928dc1e3b9f1977c94f56c1cf81f3
184 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URL `https://vilenefex.ru/award?keyword=i+am+a+child+of+god+song+lds` is a primary indicator of a potential phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://vilenefex.ru/award?keyword=i+am+a+child+of+god+song+lds PDF link annotation
    • http://roman-holidays.shop/xugegudeduky4ypv.pdfIn PDF document text
    • http://winwites.space/seat_cover_for_john_deere_750_tractoryml98.pdfIn PDF document text
    • https://fomofasagulak.weebly.com/uploads/1/3/4/8/134860280/4053036.pdfIn PDF document text
    • https://xoxitugupara.weebly.com/uploads/1/3/1/3/131383959/bivefef-mazesi-nefer-tibuzilasa.pdfIn PDF document text
    • http://dvestideyli.xyz/5th_grade_math_sol_review_worksheetsfoa1z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde10401-db96-4610-8d57-3ced3a041bf5/fuwemebolop.pdfIn PDF document text
    • http://duziroro.myartsonline.com/pocket_juice_hand_warmer_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da47fbb7-a6c5-405e-81c9-0a083fa75e3c/7955302311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8770b8fc-1761-4af9-bce3-ef0e495d9f90/what_is_a_wake_after_death.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_254fd2711ebd415ba8ec0215c0a12a4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb7510d-2d86-442d-9076-62d282498cd1/19028540495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5eaf11-c6b5-4fc8-a4b5-a682f158bc41/jogusibom.pdfIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_62883fa58240480eab0fa0eb834ef1ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4624fa3e-f081-48e9-a94d-56c435ca7c58/vodopujufinusoxozefufeved.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/hummingbird_depth_finder_customer_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e781245-333e-4470-87b6-087b10e2fbaf/how_to_make_another_website_in_wordpress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc9b341-9a30-4302-a842-93b736ac0bcc/how_much_does_a_sales_operations_manager_make.pdfIn PDF document text
    • http://filosoko.onlinewebshop.net/37541295093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f877a39-fa2c-44c3-b912-5a846956a6b5/degasud.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 5276 bytes
SHA-256: d9296cbebcf334296c6c040372a07c00c7dd223ba4b1ed250fa277834333e7a1