Malicious PDF — malware analysis report

Static analysis result for SHA-256 402372cc82729c72…

MALICIOUS

PDF

65.5 KB Created: 2021-03-22 05:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f63e9acff66f6fb2b924d87b76bf9c5f SHA-1: 26b3d32b28715580af8e9e87f615a0308da45019 SHA-256: 402372cc82729c72377b5c050d07dfb3c40b0e8b87e5e7a0a35c7abc2f70a58f
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'nuna pipa manual pdf'. No scripts were extracted, but the presence of embedded URLs and the phishing classification strongly indicate a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=nuna+pipa+manual+pdf
    • http://domen3.club/netgear_wnr2000v5_user_manualnr84f.pdf
    • http://instapriz365.online/lds_nursery_manual_lesson_17jp1zl.pdf
    • https://cdn-cms.f-static.net/uploads/4375200/normal_601abda48106f.pdf
    • https://cdn-cms.f-static.net/uploads/4465564/normal_600df3b76bed9.pdf
    • https://cdn-cms.f-static.net/uploads/4482215/normal_60127d578e607.pdf
    • http://mosomupusafebin.medianewsonline.com/patokebebaxorekeliraku.pdf
    • http://fito4ka.xyz/wepusedisavamigozuibpbu.pdf
    • https://cdn.sqhk.co/kuxaroposa/0gjBjeJ/smashed_potatoes_martha_stewart.pdf
    • http://bokaxakoz.sportsontheweb.net/physics_textbook_class_12_state_board.pdf
    • https://cdn-cms.f-static.net/uploads/4388428/normal_603d294143d97.pdf
    • https://cdn-cms.f-static.net/uploads/4501204/normal_6025b2b48a5f3.pdf
    • https://cdn.sqhk.co/waketeni/jhhfhOn/75323276248.pdf
    • http://trysalon.xyz/ionic_and_covalent_bonds_worksheet_coloring_answers5py35.pdf
    • https://static.s123-cdn-static.com/uploads/4368226/normal_5ff27add71d4d.pdf
    • http://gejudoxe.mypressonline.com/71459054190.pdf
    • https://cdn.sqhk.co/vofepubot/eslihbe/40598398088.pdf
    • https://cdn-cms.f-static.net/uploads/4446784/normal_6012725eb9f78.pdf
    • http://vijevejumozugim.sportsontheweb.net/controlar_mi_red_wifi.pdf
    • http://nopotaz.medianewsonline.com/zeperurupewo.pdf
    • https://cdn.sqhk.co/dabozijide/hiwic4K/fetefiwubolivegofaku.pdf
    • https://cdn-cms.f-static.net/uploads/4479254/normal_6013b973ef5e8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000c77d.bin
ab954d56c55704fdc2055635a903cd5e191bad2dd3e8d76355802c6aad643369
pdf-font-stream PDF embedded font (sfnt) at offset 0xC77D 4884 bytes
font_01_sfnt_off0000d815.bin
7e361699826d561c90c523728b3bc69bdb9c0589f53d791f3c9e91646e750485
pdf-font-stream PDF embedded font (sfnt) at offset 0xD815 9596 bytes