Malicious PDF — malware analysis report

Static analysis result for SHA-256 22260f75a460dd41…

MALICIOUS

PDF

81.2 KB Created: 2021-02-19 04:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 498323dad0186399af5240d5464fa1d6 SHA-1: e59ddcab54ff23a8d91359746c2bef472597a961 SHA-256: 22260f75a460dd417c5d91252dc01e9a8d79a4c459bcf54cfca45027c22ece7d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. While no scripts were explicitly extracted, the PDF structure and the presence of many external URIs suggest it's designed to redirect users to potentially harmful sites, likely for phishing or malware distribution.

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://bologen.ru/123?utm_term=black+and+decker+kitchen+tools+12+cup+programmable+coffee+maker+manual PDF link annotation
    • http://sallles.ru/839524158141pfij.pdfIn PDF document text
    • https://nukimaxirob.weebly.com/uploads/1/3/0/7/130776041/3716124.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454054/normal_5fcf07643d3e5.pdfIn PDF document text
    • https://wukemurorafol.weebly.com/uploads/1/3/4/3/134338373/e4c43f1a49e301b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_5fd33febe0f4d.pdfIn PDF document text
    • http://letnesil.xyz/familazugorevaltt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_601f13192363b.pdfIn PDF document text
    • http://thesimplycompleteseries.com/acknowledgement_in_practicum_reporth2rfn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_5fe8206581de5.pdfIn PDF document text
    • http://zepedewum.iblogger.org/rijegisitoz.pdfIn PDF document text
    • https://wanalepawipetep.weebly.com/uploads/1/3/1/8/131857983/sovixevulexidi.pdfIn PDF document text
    • https://varupeneg.weebly.com/uploads/1/3/0/9/130969993/2911332.pdfIn PDF document text
    • http://vosalax.22web.org/building_block_games_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xaninulutinofeg.rf.gd/priest_training_guide_maplestory.pdfIn PDF document text
    • http://mawafomixo.rf.gd/fishing_guides_baffin_bay.pdfIn PDF document text
    • http://padijajuvon.rf.gd/sinuxufibobonobi.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/velewipilefusudotofabefox.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/asseverazione_di_conformit_della_copia_cartacea.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/77846310171.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 5888 bytes
SHA-256: 252e3031a859a9103ac06f2d02fef18fe368ab77771a4bb200accb9ceb46f6b5
font_01_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 11340 bytes
SHA-256: d5fd2c2b0eda02b002dc87d3db9186fe7f2391506637775f7559a90dd75bdcf7
font_02_sfnt_off000128a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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