Malicious PDF — malware analysis report

Static analysis result for SHA-256 677bc00a86f2d4d1…

MALICIOUS

PDF

75.2 KB Created: 2021-06-08 17:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16a5028afd0cc21f515665db18bdb6c2 SHA-1: eb9adcdb5a1b85fc2aa8adf50c9115d7b1b72978 SHA-256: 677bc00a86f2d4d15bb8f77829d6e241dda8a684509dd47af55106e6f9d18c09
166 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to external resources, with one prominent URL pointing to a suspicious domain. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway security and deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://allytemp.ru/pbw?utm_term=emegua+pdf+download
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/dinaxomigijulu-nuroni-torinowixuma-legigumi.pdf
    • https://kigumafu.weebly.com/uploads/1/3/4/1/134131380/5340452.pdf
    • https://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/5908271.pdf
    • https://zovuzutozureje.weebly.com/uploads/1/3/0/7/130739602/7fcd9f8949cddb0.pdf
    • https://gimeboxevamovuv.weebly.com/uploads/1/3/4/4/134494840/muledu-xoliwax.pdf
    • https://lazarenebuf.weebly.com/uploads/1/3/4/8/134885148/08030.pdf
    • https://pixuvanibodaw.weebly.com/uploads/1/3/4/3/134374857/tikaxuzinu-gibimuzuwi.pdf
    • https://zuvixane.weebly.com/uploads/1/3/0/9/130969636/aeb95f31fad3b18.pdf
    • https://wufenimikefi.weebly.com/uploads/1/3/4/3/134366244/zunidov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://negovijalulu.pbworks.com/w/file/fetch/144412710/ejercicios_de_quimica_alcanos_alquenos_alquinos.pdf
    • https://uploads.strikinglycdn.com/files/6d1dbe04-fb72-488c-8d25-ea94af9c4d2c/pulgadas_y_milimetros_de_llaves.pdf
    • http://togiwuvoze.pbworks.com/w/file/fetch/144609189/15437883843.pdf
    • http://zuvuzut.pbworks.com/f/vuxazomivuzujasiked.pdf
    • http://redejok.pbworks.com/f/nagik.pdf
    • https://uploads.strikinglycdn.com/files/44e852bd-affb-4d62-bee4-0e01943e7375/chinese_tik_tok_song.pdf
    • http://wiliser.pbworks.com/f/how_to_connect_onn_soundbar_to_philips_tv.pdf
    • http://fuzobonesujo.pbworks.com/w/file/fetch/144569109/convert_active_to_passive_voice_exercises.pdf
    • https://uploads.strikinglycdn.com/files/6306d534-9b0e-4d3e-be49-8664d524666a/mobility_scooter_operating_manual.pdf
    • http://finatin.pbworks.com/w/file/fetch/144568998/half_adder_full_adder_half_subtractor_full_subtractor.pdf
    • http://dajodovilav.pbworks.com/w/file/fetch/144533652/4446447823.pdf
    • http://taxexuwej.pbworks.com/f/actividades_con_figuras_geometricas_para_primer_grado.pdf
    • https://uploads.strikinglycdn.com/files/1184b941-5dc4-4667-979f-35a4de27cbfb/hunter_i_core_controller_manual_operation.pdf
    • http://nidibewuzi.pbworks.com/w/file/fetch/144660900/96464635892.pdf
    • http://dekokos.pbworks.com/f/13610793161.pdf
    • http://gezebal.pbworks.com/w/file/fetch/144754872/recargar_diamantes_free_fire_por_id_gratis_2020.pdf
    • https://uploads.strikinglycdn.com/files/6f02e59e-8672-4c6c-af32-f964c39db4d8/vafibuxog.pdf
    • http://xovakovawup.pbworks.com/w/file/fetch/144527475/20562554204.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_off0000e9da.bin
6a661884834457b5bc583a6dbb8a8e1056cae150f866f68c9ed1c0d6a8501e7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 5136 bytes
font_01_sfnt_off0000fb60.bin
4d9ea0eca4bf955e039d6937d971a8d59abc2b99db69fff82c48bf18dec7bd49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB60 10444 bytes

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