Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84ba88c3baa9c7e…

MALICIOUS

PDF

83.8 KB Created: 2020-12-18 16:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 650449354da2e0bf3b63dd350aa29802 SHA-1: 7cbf236f585fe6e4357b5a7a1abf74eac31d78e4 SHA-256: b84ba88c3baa9c7ecff0fdbc888d503c8494257629cc7271c9fc0e2e4348753c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although the document body is heavily obfuscated, the presence of a malicious URL and the overall detection profile point towards a phishing lure disguised as a product manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=citizen+eco-drive+skyhawk+titanium+mens+watch+jr3060-59f+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4483624/normal_5fdad50b1ea7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5fdc22658d5cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_5fb7c5cd8a77e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_5f9ae719bc88b.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/5fbce344be7cfc36344e8aaf/t/5fbdf05a3f75b166439a1eed/1606283358358/head_first_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb41323-4603-47f3-8691-8888b9b85a91/what_therapy_uses_the_miracle_question.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/fawujupagezasexusepa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd14b912cb2817442fde26/1606227129928/zanti_pro_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986e9b46-6bd2-43b8-960a-fb9d9f0d7909/90396381991.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/72143942490.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc110906609fd0ee7923de0/t/5fc2beb008845d0924e431ad/1606598321738/the_lord_of_the_flies_sparknotes_chapter_6.pdfIn PDF document text
    • https://s3.amazonaws.com/ruletetunima/931-557-3062-2688_is_true.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/brochure_templates_word_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/aultcare_prior_authorization_and_referral_form.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_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 6384 bytes
SHA-256: d32c4c74b47c39d617fe2f907bc49237142104b6f9809dec86eb6901236684dc
font_01_sfnt_off00011d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D24 10740 bytes
SHA-256: 456b9fb16c4248266956188aea9e09d96730eb81330cc7fcc276536099f28aeb

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