Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff326817037368e8…

MALICIOUS

PDF

76.2 KB Created: 2021-06-06 17:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41eaa30484b4e85dfe99e5743105e609 SHA-1: 68574ca8068e0effe8622c3c8b91437e0823b7bf SHA-256: ff326817037368e89a22ac625346d994a8b83442ab5c10625f6c2ceaa5be630e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, which is likely the primary mechanism for delivering a malicious payload or conducting a phishing attack. The document body, though heavily obfuscated, suggests a lure related to social media tools.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crysiq.ru/pbw?utm_term=best+fb+auto+liker+app+apk
    • https://static.s123-cdn-static.com/uploads/4404297/normal_5feb5885ad5c8.pdf
    • https://cdn-cms.f-static.net/uploads/4425227/normal_600a9db7eb0ad.pdf
    • https://cdn-cms.f-static.net/uploads/4419452/normal_606e130e81d86.pdf
    • https://static.s123-cdn-static.com/uploads/4409113/normal_5fff58bf94da4.pdf
    • https://cdn-cms.f-static.net/uploads/4384460/normal_602198b0b3e42.pdf
    • https://cdn-cms.f-static.net/uploads/4492580/normal_60347c8b266fd.pdf
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5fcf24f25aeb6.pdf
    • https://static.s123-cdn-static.com/uploads/4406809/normal_5fe1b10d0870d.pdf
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fc87d7072d10.pdf
    • https://cdn-cms.f-static.net/uploads/4380211/normal_602f43dbc3eb2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://detomipipu.pbworks.com/w/file/fetch/144714087/gogetidajifikezalaruni.pdf
    • https://uploads.strikinglycdn.com/files/a0aa83c3-6877-4eb6-9566-8b3566a11271/john_deere_d140_transmission_belt_diagram.pdf
    • https://uploads.strikinglycdn.com/files/6130866f-ff71-43aa-a1b1-4d7edf73ae3f/plantronics_wireless_earbuds_manual.pdf
    • http://magobok.pbworks.com/w/file/fetch/144555765/twilight_breaking_dawn_part_1_full_movie_download_in_hindi_filmyzilla.pdf
    • http://mavujeridolu.pbworks.com/f/41509405001.pdf
    • http://tukufidanega.pbworks.com/w/file/fetch/144426780/chapter_20_the_cardiovascular_system_blood_vessels_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/5d06c690-8d55-4f6e-b659-06002c2bdf66/87172118647.pdf
    • http://zubipuwaf.pbworks.com/w/file/fetch/144505869/primary_source_mccarthyism_and_the_second_red_scare_worksheet_answers.pdf
    • http://wuvebag.pbworks.com/f/does_granular_chlorine_have_stabilizer.pdf
    • http://kolasotosexu.pbworks.com/f/what_qualifies_for_early_withdrawal_of_401k.pdf
    • https://uploads.strikinglycdn.com/files/e74b75c2-5d65-4ae4-988b-19aeb68b920b/13555016362.pdf
    • http://vikiruji.pbworks.com/w/file/fetch/144721338/pastorela_navidea_guion_teatral_para_nios.pdf
    • http://jowukon.pbworks.com/w/file/fetch/144648990/is_blotchy_skin_a_sign_of_pregnancy.pdf
    • http://finebov.pbworks.com/f/are_oakley_m2_z87.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_off0000eb5a.bin
c6382a660f493801893d98572782be658f813a25f1c1ef2b80eff24f53ba9800		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5A 5148 bytes
font_01_sfnt_off0000fcec.bin
45cd425b2b240c7fae07f42471fc75f30b8f994c2d01fae505eda8bfb5a05ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEC 11460 bytes

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