Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f5f8d629168157…

MALICIOUS

PDF

90.5 KB Created: 2021-02-11 11:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 59e9510d1f97acfd07d735f8f7154ba6 SHA-1: 672f490c37ab4e30808c7f34214a9971ed6c39d7 SHA-256: f5f5f8d629168157283c1bfc74b2dc21bbf610fb1535efeff08fd9e3c6de334f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this as a phishing or malicious PDF. While no scripts were explicitly extracted, the PDF structure and link farm nature suggest it's designed to lure users to malicious sites, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=makita+guide+rail+118 PDF link annotation
    • http://xawexusinuzo.22web.org/scientific_calculator_for_pc_windows_8.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/fsdwU9b/the_wolf_online_rpg_simulator_best_skills.pdfIn PDF document text
    • https://xojumupaxasa.weebly.com/uploads/1/3/4/6/134605953/dukipufafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465397/normal_6010aa8ede782.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/4b2d5424.pdfIn PDF document text
    • https://gewavidabu.weebly.com/uploads/1/3/0/7/130775927/7190999.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/AiwYChc/77430292888.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/RRD5kcW/87608808892.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/0LjjnBE/amazon_golf_balls_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405208/normal_5ff410874a20c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408333/normal_5ff3730406f83.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/XtgiFhf/japanese_wood_joints_book.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/5b76acd.pdfIn PDF document text
    • https://zawoluzowusemad.weebly.com/uploads/1/3/4/6/134697528/2030760.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/5433329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5ffcb93ad0d98.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawitaxug/jiE6Ogj/silly_walks_monty_python.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://vupafigimewex.rf.gd/xelawekogojezokanodekupot.pdfIn PDF document text
    • http://wafogaz.rf.gd/vudusuke.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_off000119b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B9 4796 bytes
SHA-256: 092d551c3c76e8f6839e29e809a560efef24a83f134a99e559e52b964b66b43a
font_01_sfnt_off00012a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1D 10276 bytes
SHA-256: ab27f4ec7ce7c92cd0d7ee548aae181daa0ffca7a09dc8f9abcf083bb79243fb
font_02_sfnt_off00014d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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