Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f96191e2db37810…

MALICIOUS

PDF

86.6 KB Created: 2021-01-09 16:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5236b442f637e080ce859b6f06a09eaf SHA-1: 7747a75b22f59da90fb644772ef20ecdbbb49688 SHA-256: 9f96191e2db378100854cbee43f3549452e0eb6042a7b453ca55f7decb955203
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://trafffe.ru/aws?utm_term=ac128+germanium+transistor+datasheet', are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://trafffe.ru/aws?utm_term=ac128+germanium+transistor+datasheet PDF link annotation
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://cdn.sqhk.co/junulevi/hihhJBc/fireboy_and_watergirl_in_the_ice_temple_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/icAmCib/lozopigaju.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/497efc79b9e1d.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/b8f4b2e12.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/2d627.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/zulumari.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/dawonosuna_todipuve.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
    • https://uploads.strikinglycdn.com/files/742ebf16-3014-441b-b47e-84ac8c558046/ventajas_y_desventajas_del_libro_electronico_frente_al_libro_en_papel.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/85604969180.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD526 3112 bytes
SHA-256: 6a3ec7e7806ec0387be040ffbc0c861244b742b38683e11e1609070091a0a20b
font_01_sfnt_off0000e035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE035 5572 bytes
SHA-256: 8bf6e0b273367a05abaf771fbaac6098142eb253a204fd8c5e1e9285782b318a
font_02_sfnt_off0000f2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E8 17168 bytes
SHA-256: e19d348f5bbb05a101800455f2c4afef09ccc1f634b5cdba26556858340ce9cd
font_03_sfnt_off000127e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E8 16164 bytes
SHA-256: c70b4877c7ec89dff5e318d7f0d6db7744657cb66f226087c606480b14a4effe
font_04_sfnt_off00013d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D0F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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