Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac368014860580a3…

MALICIOUS

PDF

70.7 KB Created: 2021-03-09 16:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 787ce362760d413b68a9b5bf7204ce7e SHA-1: e022dae681f351a1cc3b6f1aba6a7232d3ecff8e SHA-256: ac368014860580a3b9db41c173f1bf230fd923ec3b39cd868508f13826a3d176
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and potentially phishing-related. The document body, though heavily obfuscated, suggests a lure related to 'prayer' and 'download', directing users to external sites. The presence of external URIs and link farm characteristics indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=a+better+way+to+pray+pdf+download PDF link annotation
    • https://cdn.sqhk.co/xupodafib/haaUFb8/mountain_bike_tires_29.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/hgfgdij/joker_movie_lai_lai_ringtone_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/ifTDhj5/86702308104.pdfIn PDF document text
    • http://kmplitka.shop/beruzisabu35bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_602993cfb2525.pdfIn PDF document text
    • http://all-system7.work/buxinufuzibiregodinof6uonn.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/ZNujbcz/ultimate_coaster_2_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_60138206bf825.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3472eb8-14d4-4405-894e-2d0971462b3b/kusuribifekinew.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_cb7095b8dfbc408e984a0052cc036c1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/93161886988.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/kukuji.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/going_postal_pelicula_espaol_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77782a4c-4b38-48cc-9e70-e4e9d4161772/enfermedades_sintomas_y_tratamiento_del_sistema_endocrino.pdfIn PDF document text
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_6f3d252a15c14f62b2e8969004535038.pdf?index=trueIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_f8e1ac2a347645f1b1d72b53fb16f030.pdf?index=trueIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_205e4a48701a40b8bd8aaf1625e3e35e.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD889 5180 bytes
SHA-256: abbcd37777e985fe605f5d3804637917bb7cbe4e648f616cd2200c216bcb61a6
font_01_sfnt_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 10428 bytes
SHA-256: 701b7623247fa83e0986aaaa83e1f7a1a85258760b93e77fe62decb0d4412de9

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