Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afd00afd6cb007a…

MALICIOUS

PDF

86.5 KB Created: 2021-04-05 17:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 93c4a10aee2d863ca92a43314d5e6b07 SHA-1: 31859ecf515e1d6054a0f6287aca6aca19c97fb2 SHA-256: 9afd00afd6cb007a72ab6088a7388b84c45cb83243453db03bca78c191ce0186
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://zajinet.ru/strik?utm_term=does+every+living+thing+have+a+common+ancestor PDF link annotation
    • https://nofawukamo.weebly.com/uploads/1/3/5/3/135347109/tisusuzu-lowuzapiru-mokonej-bozuzoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_605968c5b4169.pdfIn PDF document text
    • http://spencermcman.us/another_word_for_excellent_to_use_on_resume7y0ff.pdfIn PDF document text
    • https://jetebudatupa.weebly.com/uploads/1/3/4/7/134748577/9ecde934.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/carmageddon_max_damage_xbox_one_cheatsobkyb.pdfIn PDF document text
    • http://pshcomonhere.xyz/best_hands_free_car_kit_for_iphone_6tfgt2.pdfIn PDF document text
    • http://yblda.fun/96101690916edqtp.pdfIn PDF document text
    • http://accueilcmb.com/80935111003ckpla.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/18644938379mtw2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_6068ea07ea7f2.pdfIn PDF document text
    • http://kinorio5.xyz/are_intps_attracted_to_infjsftvbl.pdfIn PDF document text
    • http://about-central.com/bebaxonovorivaxuh6244.pdfIn PDF document text
    • https://witojezig.weebly.com/uploads/1/3/0/7/130776148/1481059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455381/normal_605b74cfac99b.pdfIn PDF document text
    • https://riguniliwegab.weebly.com/uploads/1/3/5/3/135342973/pijufenova.pdfIn PDF document text
    • http://ubzvp.com/lurevujovac5yhl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_604b5b6b5d061.pdfIn PDF document text
    • http://nubolutlion.xyz/ikea_kitchen_cabinets_sale_2020akhds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidaberotumopog.epizy.com/black_body_radiation_spectrum.pdfIn PDF document text
    • http://tapebujetunagu.rf.gd/what_is_parmenides_philosophy.pdfIn PDF document text
    • http://fudavifakafolid.rf.gd/86008461378.pdfIn PDF document text
    • http://zexizel.epizy.com/koledileferifu.pdfIn PDF document text
    • http://xorinonaf.rf.gd/bivariate_binomial_distribution.pdfIn PDF document text
    • http://xonefepuvimami.epizy.com/bloody_roar_3_pc_full_game.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_off000113bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BF 5376 bytes
SHA-256: 60aca2469f48a57a54efbd03adde5b1d8c973089d6bc10c3ad91d3b21ee69317
font_01_sfnt_off000125f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 11320 bytes
SHA-256: b6288ac91ed7b9704bd79a3942ad87efbd3c3e485b17876688a06f53f3b2628f

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