Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5cf6bb8d96d3a23…

MALICIOUS

PDF

77.1 KB Created: 2021-05-12 14:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 51b998c6776b53f6fbe96c9ddc4be569 SHA-1: 63e464045adc43bbbdaed7c4971a8b1cc241231d SHA-256: c5cf6bb8d96d3a232107a867b2c53aeb156b833ca9e8f3282a988033de77563e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and potentially phishing-related. It contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting a link farm or redirection to a malicious site. The document body, though heavily obfuscated, appears to reference 'ssis tutorial pdf with examples', indicating a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://soxebez.ru/strik?utm_term=ssis+tutorial+pdf+with+examples PDF link annotation
    • http://kabepuvilu.iblogger.org/cs_lewis_the_great_divorce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://weralawubuzeg.epizy.com/allegedly_book.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/pengertian_behaviorisme.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/davemanexezikuzolivave.pdfIn PDF document text
    • http://tirinito.epizy.com/gezafodugijomofetegejeber.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_ac406dd714fd423b902b39747520dce6.pdf?index=trueIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_42cf5998687e46c38a08c57010d9be05.pdf?index=trueIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_0fd5ef6517fd4485a24f9084a73c9a45.pdf?index=trueIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_38d262b9de8c472c83cabc5e2506d522.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/hazmat_technician_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/call_me_by_your_name_2_trailer_deutschland.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/policy_approval_process_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/animal_farm_movie_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/topoxufufumuvu.pdfIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_1e8d988decb24c8b993f6ef8e5e74c05.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/32402368453.pdfIn PDF document text
    • http://kiluwemu.rf.gd/antineoplastic_agents.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/tobebogafomipajima.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/62839751098.pdfIn PDF document text
    • http://juzujodajemafa.rf.gd/where_is_repair_shop_located.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/dopafozemokudilifep.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_off0000ec42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC42 5544 bytes
SHA-256: 367103986c8ed22ec4b5d0978f98f5c745be84c14006510aadf903273ae92a9f
font_01_sfnt_off0000ff07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 11808 bytes
SHA-256: 7de326236b80ab633996950ec2269e6f2fd42d77d82d8de17a995186d0441dd0

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