Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e26be1494b49c67…

MALICIOUS

PDF

107.8 KB Created: 2021-03-15 20:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673967fde30a174a05c328eaa0762a1b SHA-1: 56c1f22c70c1fc59386fa265812660be81abde60 SHA-256: 2e26be1494b49c6736229a5ed73a091397fbd62a8e26f598dded7abebad187c8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'biometrics and fingerprint payment technology'. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8136

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/award?keyword=biometrics+and+fingerprint+payment+technology+pdf
    • http://suziterunedoloj.sportsontheweb.net/55994536529.pdf
    • http://nogurufegu.mygamesonline.org/74923109479.pdf
    • http://viwavidif.getenjoyment.net/magobipibisadufo.pdf
    • http://jerugujekema.getenjoyment.net/vafazuwojidugonazulu.pdf
    • http://xifutipixa.mywebcommunity.org/golegosalala.pdf
    • http://mofonuf.medianewsonline.com/ceptam_09_syllabus.pdf
    • http://pewujok.mypressonline.com/pamiduvosovo.pdf
    • http://lulizukudomiz.scienceontheweb.net/7554024072.pdf
    • http://bosemefawixuwov.mypressonline.com/gemunikozo.pdf
    • http://kitazixozakabu.sportsontheweb.net/how_strong_can_calisthenics_make_you.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zagupijalixi.myartsonline.com/lusaripujugibobaba.pdf
    • http://lejiletuvasipib.onlinewebshop.net/rca_rcrn04gr_universal_remote_codes.pdf
    • http://gavojomizam.epizy.com/tinaludumubawuwuwonop.pdf
    • http://fezitovowikawof.epizy.com/kali_linux_tutorial_for_beginners.pdf
    • http://xobebol.onlinewebshop.net/80249482536.pdf
    • http://juwovupo.rf.gd/are_dyson_fan_heaters_any_good.pdf
    • https://uploads.strikinglycdn.com/files/2e6e22e8-a995-49bb-b0e3-5589845f3e50/what_are_the_best_automatic_vacuums.pdf
    • https://uploads.strikinglycdn.com/files/c9560c13-7356-4d87-84fa-3859b75490aa/sotunevamupoleduperekul.pdf
    • https://s3.amazonaws.com/kovibu/gidogaj.pdf
    • https://uploads.strikinglycdn.com/files/6c391b63-1f9b-45d2-b55c-77aad77b8b52/61364247863.pdf
    • https://s3.amazonaws.com/vajefam/filezilla_sftp_setup_guide.pdf
    • https://uploads.strikinglycdn.com/files/7450564c-6ed5-4d25-92e0-0183aad7984f/limokuniwaxibenomivepig.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016063.bin
29785f0bab415947e56791e79f4032e2cce89c006c3d8d4063aaa19104275b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16063 5508 bytes
font_01_sfnt_off000172ef.bin
f2cce8344ebf93a987aa98dfbaa7f6e6e31d5dd7678a5b19c71f7c8abbc44fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172EF 11908 bytes
font_02_sfnt_off00019b7a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B7A 4324 bytes

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