Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57df4030daefcd6…

MALICIOUS

PDF

76.7 KB Created: 2021-03-10 23:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 01cdcae8d75c65d51d660dce5e2f4783 SHA-1: 1213b5c86efef63c6df59c992ef08af61ea02a39 SHA-256: d57df4030daefcd61f879959cabae2eda37cbde18996ec2f12a1c194cec4b68e
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://dafemum.ru/strik?utm_term=whirlpool+refrigerator+air+filter+home+depot PDF link annotation
    • http://sumigemag.mywebcommunity.org/itil_foundation_certification_exam_cost_in_india.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/why_doesnt_my_aux_work_on_my_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/figC1he/korean_kpop_news_app.pdfIn PDF document text
    • https://lokowukaf.weebly.com/uploads/1/3/4/3/134315315/3836440.pdfIn PDF document text
    • https://vexokisu.weebly.com/uploads/1/3/4/7/134717498/789df19bf7d4f.pdfIn PDF document text
    • http://nuvotana.22web.org/ragamexoxowatotev.pdfIn PDF document text
    • http://gazzsheff.xyz/swiftkey_apk_kitkathowqr.pdfIn PDF document text
    • http://biomanua.website/7338105284183xom.pdfIn PDF document text
    • https://gunatagopoma.weebly.com/uploads/1/3/4/8/134883211/8359260.pdfIn PDF document text
    • https://pasezoxe.weebly.com/uploads/1/3/5/3/135347718/844161.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/kgfqtgf/destiny_s_child_cater_to_you_free_mp3.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/orion_cooker_times_turkey.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/7679737.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/dekoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_c761f77a598f4c319f53567441fb66a5.pdf?index=trueIn PDF document text
    • http://kasanuvuwa.epizy.com/botola_live_apk.pdfIn PDF document text
    • http://ramogefakox.rf.gd/37137547240.pdfIn PDF document text
    • http://xobiluwova.epizy.com/ionic_reactions_lab_answers_labpaq.pdfIn PDF document text
    • http://fidegaf.atwebpages.com/animal_farm_chapter_9_questions.pdfIn PDF document text
    • http://rozixan.rf.gd/stratiform_gym_miami.pdfIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_b960257e3fbd4486af26b44edc3e0a10.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_off0000eef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF2 5288 bytes
SHA-256: 9bc697f12f5c69366ea7d20670ca9f76f7d636c43742a676324dfe02711ce970
font_01_sfnt_off000100d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D4 10812 bytes
SHA-256: ecb819dc6f63dafdc91631d8ce2b69e5e66b2742b5763d52ba3f7c00e6d38ea0

Open this report in the interactive analyzer, or submit your own file for analysis.