Malicious PDF — malware analysis report

Static analysis result for SHA-256 4961abcf29583507…

MALICIOUS

PDF

72.0 KB Created: 2021-03-02 19:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e923f1bf462f6de1a42f01a2bf688927 SHA-1: 4e12b9b12ed3f2279aff29c0ea5786842ff522fa SHA-256: 4961abcf29583507a2f720e1010308787dbcbdbcbd1125438be150878a252c96
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized to appear as legitimate content, a common tactic for link farms and phishing sites. The ML classifier and ClamAV both strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The embedded URLs suggest an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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=among+the+impostors+chapter+1+summary PDF link annotation
    • http://dizititakozazi.mywebcommunity.org/andromeda_strain_movie_2008_download.pdfIn PDF document text
    • http://tehnotop.site/650934577574klhi.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/timosagotiviwadodiv.pdfIn PDF document text
    • http://terugate.mypressonline.com/xamesigenejatelib.pdfIn PDF document text
    • https://misirukizos.weebly.com/uploads/1/3/4/0/134017349/ranuzesebekuxop_rexitupidufog_vekovo_kelir.pdfIn PDF document text
    • http://yourlivehelp.com/cocina_criolla_peruana_recetass5x49.pdfIn PDF document text
    • http://return-0.com/garimileliwakuxabumugesolijf8v.pdfIn PDF document text
    • http://politach.com/earthquake_worksheets_for_middle_school3uauf.pdfIn PDF document text
    • http://nakrutkavk.site/elementary_differential_equations_william_f._trenchw8sff.pdfIn PDF document text
    • http://stonersfranchise.com/143021740340330w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/kumukuxugubavabivele.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/chori_chori_song_salman_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/kujolabunulowirila.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/pupukur.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/camden_market_brand_guidelines.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_off0000deef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEF 5460 bytes
SHA-256: e8e0b61dff569e52682d7f30c50fc5012c6c668c6faf07b23fcc8022f2a77a89
font_01_sfnt_off0000f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16B 9856 bytes
SHA-256: 62c7b32c15db3ba8d63d7fd46d344d574c27352e10e9ca2c1fe3e283dc952554

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