Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b888cfb4ad0f5d…

MALICIOUS

PDF

71.0 KB Created: 2020-12-14 13:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 28ec6eb8642206603ad5eaed158d4bfa SHA-1: df7833f45d7487939ff8664d11ad852d5915b052 SHA-256: 88b888cfb4ad0f5de77b46a748db9af1fd4db4ab603447f2b630106608c0c119
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, disguised with a seemingly benign search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI points to an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=earth+balance+peanut+butter+nutrition+facts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5fbed24950bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_5fd2c79c83255.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc101b088c99b6d37a7afc3/t/5fcba436da45e86ccaa7d2b0/1607181367978/majinoxig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe42ac7acac6192a8cdb0e/1606304429802/histone_proteins_in_bacteria.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbca2e537a05ef08df7c/t/5fc1177f1972c46e3cc50df9/1606489984058/fopilutinapumusufodinevub.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b3f1d49dd12447331c2b/t/5fc3b0c0173fb5383b13f994/1606660295075/the_peace_of_augsburg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51130ea4a794d565ff698/t/5fc9be0a3ff94c207e086b59/1607056907191/best_sudoku_solver_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/videohive_templates_powerpoint.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a954239b0722913c9654/t/5fc55ceb2dd96f5918a0b37c/1606769900441/88656103898.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6518f0a2757459b07e98d/t/5fd22cf287bef85997f889a9/1607609589368/bullet_hole_png.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0baa35687f52b6b804624/t/5fc1620feaf37e3b64d0116e/1606509073449/tv_guide_bloomington_mn.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee10f8cdb769c6a7fc76/1606282768688/jirogafamutixu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00570a3bf4b14aba44e61/t/5fc2e44dfa04221c717f975e/1606607950520/cuyahoga_community_college_hack_transcripts_request.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a6fa579eee3ae06f1228/t/5fd6014f9264095525c94207/1607860563094/fajajitanavanetoxexajide.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_off0000d955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD955 5200 bytes
SHA-256: 0ccd41f06302dce835af0336f4eddd8cee0c0ad9b975d09038ce356e50dafcd1
font_01_sfnt_off0000eaff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFF 10672 bytes
SHA-256: 803404b0e9aff4daab2973e525c3a350d74d645353b4115d84e7d0e19de90349

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