Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca4bb284a2620ca…

MALICIOUS

PDF

69.9 KB Created: 2021-02-25 20:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bbe9029ab27c98bcadf00e470620d1a3 SHA-1: 33fb9b48130f1500cdd22430326533682cff11ba SHA-256: fca4bb284a2620cafbbba1e27db9e6ee21e7fc326f0079c36993665181a737c6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wb?keyword=descriptive%20writing%20techniques%20year%206 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416513/normal_60247dc625c18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480594/normal_600978810c8a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445118/normal_6009f7a39fbfc.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvevalor/gepoHii/vijesosudikebina.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/fuRhgif/vintage_nishijin_pachinko_machine_balls_plinko_arcade.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/S4ifV0S/lathe_simulator_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447087/normal_5fdc73c01d99d.pdfIn PDF document text
    • http://velodarimu.iblogger.org/farmall_super_c_starter_parts.pdfIn PDF document text
    • https://nozoporunetub.weebly.com/uploads/1/3/0/8/130814805/17f4253e7e4e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_60235697b19d4.pdfIn PDF document text
    • http://temevifeg.iblogger.org/quran_recitation_and_english_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/hheANvB/lomesukatu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xamewesaz.rf.gd/47815552102.pdfIn PDF document text
    • http://pagitewuzowika.epizy.com/92490977770.pdfIn PDF document text
    • http://situgew.epizy.com/4818059912.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_off0000d46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46E 5696 bytes
SHA-256: f1d9751d892bc4d4ef2aad037afedf6d37f7b5ed2b8c4fd45f7b84165e035adb
font_01_sfnt_off0000e7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F1 10104 bytes
SHA-256: 42863c22e4b6662eb7a65f95f7259853e544994911f2958c120e1a91b54cecb5