Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4487c134fd4b38…

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 06:34:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 343b23eae47b44b260ec1f950e23a0b7 SHA-1: ae6d309b096b8b31406d90456fb376a6b626974d SHA-256: bd4487c134fd4b383fe129ea3acc5ac3d9796141e88b0f4a21a423811a1d500a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution attempt.

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://vilenefex.ru/strik?utm_term=omega+nutrition+centre+masticating+juicer+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490953/normal_60494565ad6ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487424/normal_5fd15edca99c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387430/normal_5ff65b306b24a.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzudumijamo/jh39Sb2/momexax.pdfIn PDF document text
    • https://cdn.sqhk.co/nomevagume/ghghi1C/4k_video_player_apk_free_download.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/josumexafitisasesum.pdfIn PDF document text
    • https://cdn.sqhk.co/fazologim/gcg0hae/nesolepuxitaretuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_603a94d76e9cd.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/47577293543.pdfIn PDF document text
    • https://rijijuxika.weebly.com/uploads/1/3/5/3/135346754/c98d3510b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465539/normal_6009928cc11a5.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/bobugujuvivuk-delobapatim.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/ibhevjf/guns_for_minecraft_1._16.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/gapebogujot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415526/normal_602ec1aabd6ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_c7d79b89d7414921b40a0db722830be4.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_2595985ddcff42b2aabfad26bed19713.pdf?index=trueIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_c1c3ce3d75904a9fb0c5a53410d6019d.pdf?index=trueIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_313a041accbf4941a9ed64a32c4b0b7f.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_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 5340 bytes
SHA-256: 0cebaa64c546dd9387bb9e0027c8c7386518cbbec55606c1e4945ef4a0155422
font_01_sfnt_off00010876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 10724 bytes
SHA-256: 31a9c1661023a5ab775604f5cc2d1925278576dd267c702ff13178d58ea2e658

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