Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dfa1048690af57…

MALICIOUS

PDF

74.3 KB Created: 2021-02-10 18:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e63d83d2a0cb617a1c6d184e8ee7eae5 SHA-1: 50764f2d9df54aa7eda60b8fed5e64328e24fe06 SHA-256: d0dfa1048690af577d20e3f363a08b430f0521ef66bc5e56a6fa3a886e6ee001
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded document body text appears to be corrupted or obfuscated, but the presence of URLs like 'https://maypoin.ru/aws?utm_term=arya+telugu+movie+songs+320kbps+free' indicates a potential lure or tracking mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/aws?utm_term=arya+telugu+movie+songs+320kbps+free
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/mevizovisulif.pdf
    • https://tiwudusakuwizir.weebly.com/uploads/1/3/1/6/131637104/b4da0f.pdf
    • https://josuriwomevopi.weebly.com/uploads/1/3/4/7/134769094/benepegawage-mekisukonisawuj-tenemavas.pdf
    • http://microbladingcertificationdfw.org/noweludepovabujugizewx43x5.pdf
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/bojemelapoxexiz_veworejid.pdf
    • http://onlyforyou.space/66004155852mgos4.pdf
    • https://xezamojukugenu.weebly.com/uploads/1/3/5/3/135316948/kajolado_sadikon_dumadebukej_mesuviragibid.pdf
    • http://nufapivevavenak.22web.org/93541789734.pdf
    • https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/mefufawab-manofifibom-luwef-zuwamojowe.pdf
    • https://rukufutuseju.weebly.com/uploads/1/3/4/7/134748195/4656641.pdf
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/5564404.pdf
    • https://fisikovomit.weebly.com/uploads/1/3/4/6/134652659/8c368c.pdf
    • https://tojoxuponoseb.weebly.com/uploads/1/3/5/3/135395296/tozilarofilopufobu.pdf
    • http://tivaxamikesu.iblogger.org/maths_worksheets_for_grade_1_number_names.pdf
    • https://bujefodamefizup.weebly.com/uploads/1/3/1/0/131070612/e83b3059.pdf
    • http://ighelpcenter.xyz/batevazusukopixafegh35n9.pdf
    • https://jokasagumejede.weebly.com/uploads/1/3/1/0/131070006/8154371.pdf
    • http://toportt.online/befofevuvaduj0wvo1.pdf
    • https://gumopaxegekugod.weebly.com/uploads/1/3/4/0/134018731/ce328fb70.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sofijorube.rf.gd/chaconne_in_f_minor_sheet_music.pdf
    • http://sewugobavi.rf.gd/read_theory_answers_google_plus.pdf
    • https://s3.amazonaws.com/gateme/19741380497.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_off0000e294.bin
b41641c241d0c0d2e257dfdbe29d35119b023e81a00031684eb244bd77b06a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 6012 bytes
font_01_sfnt_off0000f705.bin
82d18913d3e3b5451b28cd26074b06006ede1a9cc7823d0e239c770967b2f2d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 10740 bytes

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