Malicious PDF — malware analysis report

Static analysis result for SHA-256 0991e80e24e5fde5…

MALICIOUS

PDF

69.9 KB Created: 2021-06-11 19:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e48c9f0c0410a36f3850a829bf19f4b4 SHA-1: 1d6f9cff01ca75865d74f16e991806ac0aaadf64 SHA-256: 0991e80e24e5fde5aa398a5888731a5aa653feaf2307e956436778b3e548297a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/123?utm_term=mobile+frame+png+image PDF link annotation
    • https://vowizata.weebly.com/uploads/1/3/1/8/131856430/8d8c80374a1f592.pdfIn PDF document text
    • https://depujoseteg.weebly.com/uploads/1/3/5/3/135309287/9834769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_600b4a4f47700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5ff4bb66d4586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_6049920193ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_6052dc27db10b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385869/normal_5fdcbcab845d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_6044a030c2922.pdfIn PDF document text
    • https://lepivigodegobuz.weebly.com/uploads/1/3/7/5/137505729/518f954957.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4381108/normal_60b21ac5b7697.pdfIn PDF document text
    • https://bokepamukabina.weebly.com/uploads/1/3/5/2/135293240/9793961.pdfIn PDF document text
    • https://lufaranari.weebly.com/uploads/1/3/4/6/134689474/tagekusova_xogek_kumikupo_nudodisijis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454999/normal_602e4ef4be388.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/283b5cee-97a2-4823-9e0c-fcbd733bf314/ignition_key_problems.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/w/file/fetch/144798126/28875593020.pdfIn PDF document text
    • http://fuvulokaxeka.pbworks.com/f/how_to_tame_therizinosaurus_ark.pdfIn PDF document text
    • http://movovepavuzi.pbworks.com/w/file/fetch/144656892/how_much_oil_does_predator_4000_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097cc0fa-52b6-47f3-9e2d-8e5ae87eab37/87849891853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664ec886-d11c-4e09-9757-a6edc9237b68/23783371580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786cb50b-f894-471a-aab8-24786116e5c6/how_much_does_an_industrial_organizational_psychologist_make.pdfIn PDF document text
    • http://sagidetubi.pbworks.com/f/marvel_spider_man_setup_download.pdfIn PDF document text
    • http://zuwofig.pbworks.com/w/file/fetch/144616197/weight_lifting_exercises_for_beginners_female.pdfIn PDF document text
    • http://lifabukis.pbworks.com/w/file/fetch/144925464/70496828147.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/how_to_send_a_big_video_on_discord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f14426-d230-46d1-94de-1e8d76ecf23a/the_little_prince_summary_by_chapter.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_off0000d622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD622 5188 bytes
SHA-256: 5ea71da217e5e46c460caf9b156aa1b6083f678d02365d2e6c5f9bff7c9b24db
font_01_sfnt_off0000e7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 10112 bytes
SHA-256: e86a41a6f85aa5d6e89ef9562aa0a36b1b659a0614cf24229c07a4e14a769627