Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ff3aa14287a47c…

MALICIOUS

PDF

70.7 KB Created: 2021-02-17 20:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b8b30dc813e2bf8d4be3cd2bbb1a80f5 SHA-1: ba06c0eb81dfc5ace8b1c83deefa406a872cb6bc SHA-256: a7ff3aa14287a47c7d4694154197d50fefed980181b6ab3e76d2d75525a863d5
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • 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://bologen.ru/wix?keyword=payless+return+policy+worn+shoes PDF link annotation
    • https://semebikifotiz.weebly.com/uploads/1/3/4/7/134752265/semevesukifofi_fobavef_bezimiseboruzu_sexuzisinuz.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/bjaiblS/king_tongue_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/womalakifaxa/6jfRgjy/warcraft_gameplay_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530070/normal_60119b66e1f3e.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/haviaTo/the_earth_nowadays_essay.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/Wzjdivt/basuxonet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_602c777d2f052.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/glencoe_geometry_chapter_8_quiz_1.pdfIn PDF document text
    • http://wowit.pro/zijixumiwimitels8vw5.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/bzrSijF/exodus_14_14_nkjv.pdfIn PDF document text
    • http://nizeguz.iblogger.org/81026057864.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/U68jaih/radio_one_rock_show_slipknot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_601b431891711.pdfIn PDF document text
    • https://cdn.sqhk.co/bogabixexuja/26Ark3C/halloween_costume_ideas_for_best_friends_pinterest.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://devepovamijube.epizy.com/channels_of_oral_communication.pdfIn PDF document text
    • http://xifawuzegeliwag.rf.gd/25160538597.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 5216 bytes
SHA-256: e88947f4226b5aa8f9be45a1bd949b3c37bbee3b422faf8ec8f28b4cbee1ed24
font_01_sfnt_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 10504 bytes
SHA-256: 55304c3ad81bd4a1bcf6beedbcb74699d131ccb805401008627a5401ab1fb3eb