Malicious PDF — malware analysis report

Static analysis result for SHA-256 62aa2284e8464b40…

MALICIOUS

PDF

84.4 KB Created: 2021-04-10 11:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a0d9d6e193c13a4d5a0106ca52ac558 SHA-1: b4936f144bf59fee71e4e3fa24eaeebdd9f0a47f SHA-256: 62aa2284e8464b4052d6904b8dc5024f76d5690039332d2414e287a00a3f8ecf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a payload or visiting a phishing site. The document body, though heavily obfuscated, appears to reference 'Anytone at-5888uv programming software', suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=anytone+at-5888uv+programming+software
    • https://cdn-cms.f-static.net/uploads/4416659/normal_603ccbfb5bddd.pdf
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5fc8eadd1dd8f.pdf
    • https://cdn-cms.f-static.net/uploads/4416318/normal_602b26f293a70.pdf
    • https://static.s123-cdn-static.com/uploads/4404308/normal_5fccb1ba17677.pdf
    • https://cdn-cms.f-static.net/uploads/4412154/normal_6014919b5589f.pdf
    • http://jobediniberine.scienceontheweb.net/advanced_reading_comprehension_worksheets.pdf
    • https://cdn-cms.f-static.net/uploads/4366993/normal_6059abd6bfeb7.pdf
    • https://cdn-cms.f-static.net/uploads/4495413/normal_6028c0faa0739.pdf
    • https://cdn-cms.f-static.net/uploads/4408871/normal_601ac04b7fdbf.pdf
    • http://xorabawik.medianewsonline.com/gowerudojepuduwagid.pdf
    • http://bewujasixi.mywebcommunity.org/videosecu_ml531be_tv_wall_mount.pdf
    • http://pogawubujogeje.mypressonline.com/3971060293.pdf
    • http://lazirog.mywebcommunity.org/pirosawadazemilus.pdf
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5fda9348df1a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xagewozutuke.epizy.com/49068026875.pdf
    • http://kuxubakelixuzot.atwebpages.com/simple_bending_equation.pdf
    • http://kuzemepusiloj.onlinewebshop.net/roreroti.pdf
    • http://gaxekexo.rf.gd/sizivir.pdf
    • http://gupepitasaxisal.epizy.com/ciclo_de_krebs.pdf
    • https://s3.amazonaws.com/salade/3971927179.pdf
    • http://rixuzomobe.epizy.com/60302096856.pdf
    • https://s3.amazonaws.com/pafexegud/gif_animation_online_free.pdf
    • http://tibobabinenan.epizy.com/jitivusalaginuwog.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/holy_tamil_bible_app_free.pdf
    • https://s3.amazonaws.com/lolijexejomak/chinese_drama_app_with_english_subtitles.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_off00010b5a.bin
409789d8bdd4e44010e141796a6116dfa304c8e9e3ff138f2d8c95afc2a383de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 5780 bytes
font_01_sfnt_off00011f21.bin
d400a77881043a618996d6a3dcd364cc63a62f71762b943e1a152356ce9f4eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F21 10716 bytes

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