Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d1e057a1a9aea0…

MALICIOUS

PDF

67.1 KB Created: 2020-12-23 09:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ada22637fa15ace7360e38f48bd28821 SHA-1: 98a6c9967423d3322a941185a0e2fc633595f4ca SHA-256: e5d1e057a1a9aea03094abf9ca5e2dd7df4fed92f7438242094c385fd05b7ff1
164 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URI pointing to 'traffnew.ru/strik'. The document body, though heavily obfuscated, contains text related to 'Test na koronawirusa krakow', suggesting a lure. The presence of numerous external links, many pointing to PDF files, indicates a potential attempt to distribute further malicious content or engage in SEO manipulation for phishing.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/strik?utm_term=test+na+koronawirusa+krakow PDF link annotation
    • https://tozijaletaxe.weebly.com/uploads/1/3/4/3/134312516/64959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f99aa3140e53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485308/normal_5fc713c22bfe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5fa653659c5d7.pdfIn PDF document text
    • https://zubetotuduve.weebly.com/uploads/1/3/5/3/135340520/8317641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4e751b-f00e-4718-9e8d-67cc85c17c0a/99166442455.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/84415554948.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/zodakaxik.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/bmw_e60_repair_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a7b2ff13940aa25ff9c1/t/5fc9fb024e3f3d25174074ee/1607072517708/71327527505.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfa702dd96f5918b4226c/1606285937583/vagujogafokuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcd3d0e-9e61-4331-98b4-3197ad4fd45a/with_great_power_the_stan_lee_story.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/iq_test_questions_with_answers_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/blair_witch_2016_full_movie_free.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_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 4752 bytes
SHA-256: 7f47bb700140d8d9c7d4db9f27a5ea4b49a4bac6e013394429452f9f0b28d9f4
font_01_sfnt_off0000db6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6B 10916 bytes
SHA-256: baf13b747d04d32d89e43f27c9b85337ec0baa65b86e7dffbd0cbca74828b902

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