Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01fbb75faeb35ef…

MALICIOUS

PDF

81.6 KB Created: 2021-03-31 02:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 71fcb25d2ba14ec55c072d27f877608c SHA-1: d19b5dbfe0cf94407f201710fe2670aff4b84b32 SHA-256: d01fbb75faeb35ef21baabe12a430b23664ceb55d7f62708ca9a79a8001348f2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, including one to 'gimoguvi.ru', suggesting a phishing or spamming operation. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=how+to+draw+a+dog+nose+for+beginners PDF link annotation
    • http://tukiviretek.iblogger.org/vikepej.pdfIn PDF document text
    • http://milatepe.medianewsonline.com/chromate_conversion_coating_process.pdfIn PDF document text
    • http://vebenuzan.22web.org/64594590772.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/adobe_reader_free_download_for_windows_7_ultimate.pdfIn PDF document text
    • http://bukivagixunok.22web.org/louisiana_earned_income_credit_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_a18a375c13ff4bddbe11a2cd381ec91d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e30a8e-bb11-48df-8005-a4037155db26/jewoguja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db51dfa-f746-4254-8902-da341fb9889b/kenwood_kdc-bt648u_protect_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1734e59-d2cf-4e18-921d-4e5e744fe75a/pikidabepirek.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/hidden_secrets_of_the_bible_history_channel.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_9cff087d47a14682abd31e6e72d38b1f.pdf?index=trueIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_b4f02e9e07924b7ead183115154497cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4236479a-9a67-440e-ac6b-22f6a8cefb7b/tactics_ogre_let_us_cling_together_ps1_classes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/512655d8-a8ba-4fa9-b3d0-0228467ce13b/tipigoradurige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2573fd9e-6d2f-439c-b8c1-ca9d83cd4d43/wixutazan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9fdc1a-f021-4435-86ef-ac38ceae4f6b/kujiverovikenizafoxo.pdfIn PDF document text
    • http://kuzixejupizago.epizy.com/76834577257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e63648f-c5c3-4c07-bef7-6c497416327c/who_sings_one_day_more_in_les_miserables.pdfIn PDF document text
    • http://titugol.atwebpages.com/navy_medical_corps_incentive_pay.pdfIn PDF document text
    • http://mifawebof.epizy.com/primo_water_cooler_leaking_from_the_top.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8be50d7-f881-4aca-96ae-e9467fbd383a/73176506349.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/47253551083.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_0e2f8632e48742ae8cbfe02a22f206a8.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_off00010359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 5236 bytes
SHA-256: 0b3075b58ed1a47e0810dbd67fe7f7d710c8d15e68c80aef5c36ef2288edd072
font_01_sfnt_off00011548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11548 10564 bytes
SHA-256: 88ce670b1227bf9fd09868efcd88142317163b66b26f75696e694c77477a3236