Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf0a08ac9ff7ef5…

MALICIOUS

PDF

70.9 KB Created: 2021-02-28 21:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a083bbe0c047fdf22c4d46ffbd27fa3 SHA-1: 801f332094eab043e7c1c3245da184c5ac020d8a SHA-256: ecf0a08ac9ff7ef5cdcbe749da9939a403abbe8225c8339f116f7cfbb7137bd3
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'pelibifir.ru' was extracted, suggesting the document's purpose is to redirect users to this potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URI strongly suggest a phishing or malware delivery attempt.

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
  • 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://pelibifir.ru/wix?keyword=ginkgo+biloba+costco+canada
    • https://cdn-cms.f-static.net/uploads/4450511/normal_6014d02cd41d9.pdf
    • https://cdn-cms.f-static.net/uploads/4368479/normal_6018381e56010.pdf
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/1765199.pdf
    • https://cdn.sqhk.co/zarifabidit/h3hdgdy/turbowheel_swift_review.pdf
    • https://leliwigozamik.weebly.com/uploads/1/3/0/7/130738568/pikopovu.pdf
    • https://cdn.sqhk.co/derebeduno/3uZReM2/life_is_strange_2_ps4_trophy_guide.pdf
    • http://tuderoba.getenjoyment.net/behringer_xenyx_qx2442usb_specs.pdf
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5fc9a5ca01650.pdf
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5fce202deefa6.pdf
    • https://static.s123-cdn-static.com/uploads/4412996/normal_5ffbab284417b.pdf
    • https://cdn.sqhk.co/vujenibolo/gggfheG/linear_equations_word_problems_answer_key.pdf
    • https://cdn.sqhk.co/kilatelazobe/ShNdpNS/94077217410.pdf
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/4bcde04a4a6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fubavinexazixo.onlinewebshop.net/are_vox_amps_good.pdf
    • http://xogijowag.onlinewebshop.net/sony_bravia_tv_wont_turn_on_red_light_flashing_2_times.pdf
    • http://zubiluwetij.myartsonline.com/toduvimawifezoxalejagomi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d88b.bin
5a96136ddf5d553656c17d81a23f7bc0d697d1a7b4a9b08f044265ac7009667f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD88B 5248 bytes
font_01_sfnt_off0000ea7f.bin
9f5979f78ec5e0abb631a6194940ba7a2436307c73b6207bb390268418261dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 10660 bytes