Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a196dd2267c115…

MALICIOUS

PDF

79.9 KB Created: 2021-03-19 03:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c2c41ea802dcd0c047f6661f7f2911df SHA-1: 5c75ab3d9e88e796ee17c14153b32073261d1a25 SHA-256: 42a196dd2267c115e882c8057b5dbad7fa9d160be87dfae16d430ef20b89910f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/aws?utm_term=best+penny+stock+less+than+10+cents PDF link annotation
    • https://galinigogazefu.weebly.com/uploads/1/3/2/6/132695851/tegiputoximu.pdfIn PDF document text
    • https://lirukasuk.weebly.com/uploads/1/3/0/7/130739032/vixewuk_pikigivig_nakulos.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzonabudad/fNhfcij/my_bucket_list_meaning_in_english.pdfIn PDF document text
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/c4b2f.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/bbcc41fe.pdfIn PDF document text
    • https://cdn.sqhk.co/tijovomiv/gJ1ja1U/gewap.pdfIn PDF document text
    • https://fagugirawax.weebly.com/uploads/1/3/4/3/134388021/3802069.pdfIn PDF document text
    • https://vekukexulijoj.weebly.com/uploads/1/3/4/3/134397774/9129448.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/71aec595-cdbe-442c-aa64-844bca76c521/45_second_presentation_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014f1413-2be2-459c-8017-428cd154d42b/what_is_catching_fire_book_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0b00a3-9f7a-4327-ad47-9fbfa80de087/what_does_breaking_a_norm_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f0581a-df2e-4487-8343-ac5829b04437/xowinopowete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588210c2-597e-4583-8cf1-00bf98eb6719/creative_sb_x-fi_titanium_hd_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ea76bf-fe50-42b9-8ec8-bb94d5dc6897/85846196128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26fb03ef-f0d9-4654-831d-9264960d6093/how_much_does_a_polaris_1000_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5d9d91-5ec5-425a-b491-cfc6b449f891/zapibovevif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c793db76-483d-4f7a-be4f-65a093f8ef4c/what_are_the_parts_of_a_kitchen_faucet_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45a61df-da98-4195-995a-44d345d5f3c2/tokop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1220b5f-7810-4fca-8c59-3da0087abb51/phd_mechanical_engineering_salary_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee166d32-f9ec-4d2d-9215-b6e3944a9e20/1211683609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afcd9cc-9b56-41e2-b9e5-9921e96e83d4/41602667000.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_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 5336 bytes
SHA-256: ab4de73f807d8a73c5ed8a37f4f028a080e243dea8665412cf82aecdd56110ff
font_01_sfnt_off00010cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF2 10948 bytes
SHA-256: 0516c66fdc5ba7c8b1b6bcba8e2c1ecb0f5cdc06d1f0415021241fd0edb692d3