Malicious PDF — malware analysis report

Static analysis result for SHA-256 95deb607d63d0a79…

MALICIOUS

PDF

93.9 KB Created: 2021-03-19 16:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 933c4a980c5e92ce5a871d42982eb5b9 SHA-1: f7b09d1a912c504f2f5bebb6a2c590513cfcda90 SHA-256: 95deb607d63d0a7980745c734f7ac0d3e2c150da66363a4c18cb3658e5b65972
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 0.9992

Heuristics 6

  • 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 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://xajibur.ru/123?utm_term=gomorrha+staffel+1+episodenguide PDF link annotation
    • https://cdn.sqhk.co/gofelaxes/hjgjfhe/brown_rice_nutrition_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_6050b89753d45.pdfIn PDF document text
    • https://jusisobopat.weebly.com/uploads/1/3/4/3/134326654/rolito.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidazi/sndV4ij/64781953028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_6019ab5674702.pdfIn PDF document text
    • https://vavozeja.weebly.com/uploads/1/3/5/3/135308761/c93c7ed0f33d94.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/gmjgUic/tower_color_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418184/normal_5fd96afdba07a.pdfIn PDF document text
    • https://dojebuxepoviguf.weebly.com/uploads/1/3/1/4/131407435/d44d0.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/jhgihnJ/endless_run_magic_stone_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/XheEjam/happy_wednesday_fall_pic.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/ihfpjha/19103924518.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/jiQjfB6/spy_mission_games_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406202/normal_5fef7d386e84c.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenosefob/ehaQgdq/good_pizza_great_pizza_stewards_challenge_day_57.pdfIn PDF document text
    • https://cdn.sqhk.co/menekilebuz/9hiic6M/58752122203.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/mibjbyR/vukajerowitiromupuxedapiw.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/hf4jejc/xcom_enemy_within_manual.pdfIn PDF document text
    • https://selijexobava.weebly.com/uploads/1/3/1/8/131856120/duzevovenone-gaposekakoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_96f8b198f5d849109169d180028eba29.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_ae1f4236ffed46bb8a3ff7b87ac3c922.pdf?index=trueIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_77466016ae2f4be588310f974655e6e2.pdf?index=trueIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_445fc046e1324597a21b15fcb239b490.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_3edf79006aa34f678fe0e8782551f8e8.pdf?index=trueIn 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_off00013081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13081 5536 bytes
SHA-256: 7d94e9b780cfb1b72d01651c23f30f42046ac7f87cd957c08f401ab5b3a3f8da
font_01_sfnt_off00014332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14332 11812 bytes
SHA-256: 8efc4c747592426316acdcba9cda0e1dd78298175859a53538583ebefa6c170c