Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcecda41f05e3411…

MALICIOUS

PDF

77.6 KB Created: 2021-02-14 12:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a9fc60501077b21659b74bfa94b40c3a SHA-1: 82f85d387836d722f4e64980036757b96be32605 SHA-256: bcecda41f05e3411dc0eca4ba5af7273f0879fc724628258efa4657c9d15a967
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, characteristic of a link farm designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's part of a larger attack chain, possibly involving spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://bologen.ru/123?utm_term=statutory+law+includes+state+statutes.+true+false PDF link annotation
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/kemabatamavewe_dirobeja_fotajuriruvufi_talifevava.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/fKEkLeM/interstellar_rodeo_2020.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/6354537.pdfIn PDF document text
    • https://bivibonade.weebly.com/uploads/1/3/4/0/134041173/bamizitupo-begojajakol-mijusipuwu-lufulofukipe.pdfIn PDF document text
    • https://napuguzexavuzes.weebly.com/uploads/1/3/4/8/134875267/a4a257b.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesavif/icJTDEl/zuvojowelufa.pdfIn PDF document text
    • https://tupemewona.weebly.com/uploads/1/3/0/7/130775182/bff97ce42c1.pdfIn PDF document text
    • http://susojatafumo.22web.org/lasobo.pdfIn PDF document text
    • https://dajusokododolin.weebly.com/uploads/1/3/5/9/135964726/4e68b7ef057802.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/ntZiihe/gun_mods_for_minecraft_pe_download.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/fXma20o/33440912982.pdfIn PDF document text
    • http://dapumad.iblogger.org/56549909720.pdfIn PDF document text
    • https://peliwotamo.weebly.com/uploads/1/3/5/3/135325711/tomedozikari.pdfIn PDF document text
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/tipudupipuk_tezufimura_savesexo_kapor.pdfIn PDF document text
    • https://fawukudaboguris.weebly.com/uploads/1/3/4/3/134353338/xamufapano_fipif.pdfIn PDF document text
    • https://cdn.sqhk.co/worupageke/hjNu6gi/dj_botal_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doruxexim.epizy.com/lukamudunu.pdfIn PDF document text
    • http://zaniwemikadas.rf.gd/juzivono.pdfIn PDF document text
    • http://senoburem.epizy.com/rotenobiwufipe.pdfIn PDF document text
    • http://vusanaxipunuli.rf.gd/jasper_report_error_cannot_find_java._exe.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/brother_in_arms_3_apk_mod_offline.pdfIn PDF document text
    • http://najaxobefirag.epizy.com/47662593747.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 5344 bytes
SHA-256: 3bd6e4f25a4d5994036565f3f281b2d3fe8a3dc968738ac70866ce4e8a601490
font_01_sfnt_off000105fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 10188 bytes
SHA-256: 9a07dd9c43a33425c4252093c03f7722b44a230bf3bc98a51c1abfc1c15b256d

Open this report in the interactive analyzer, or submit your own file for analysis.