Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d8f245a413029b…

MALICIOUS

PDF

87.7 KB Created: 2021-04-01 05:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b651c856b930d05f05faa0f8a54fcec SHA-1: 56290bfcf9fade3674080cc0307889faf5cec552 SHA-256: 39d8f245a413029b1fa23ad01457752aefaba9a9c79d1239cb0601044cfa54bb
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of numerous external URLs and the heuristic findings point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://botokaw.ru/aws?utm_term=webasto+bunk+heater+maintenance PDF link annotation
    • https://s3.amazonaws.com/radubozufiwo/real_estate_newsletter_template_ideas.pdfIn PDF document text
    • http://small-italy.space/fikewtfda8.pdfIn PDF document text
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/pudidij-kapowerisonujoz-vofodoruregodak-foriwaxame.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/cup_of_jo_mothers_day_gift_guidexvugh.pdfIn PDF document text
    • http://ctuxuu.com/kewajajapujenojiwurav7q1dt.pdfIn PDF document text
    • https://nugukofijopi.weebly.com/uploads/1/3/2/7/132712180/mivuwekupabomir.pdfIn PDF document text
    • http://svoydvalend.xyz/adobe_pagemaker_7._0_software1nj3h.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/10396308538.pdfIn PDF document text
    • http://prechambre.xyz/957334175216y72r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_fd7f720e9d2641399f84f4c7f2357155.pdf?index=trueIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_e800b756e65e41af9af057c3414a0ac6.pdf?index=trueIn PDF document text
    • https://24b051fc-04af-4e2d-8b9e-4e75c06063ec.filesusr.com/ugd/1a488c_85fa7caaad7e426fbf68a5185054e4bd.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_9bb3d046ca3848e0bad2df4a49cad6da.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd886c4-9f2e-4625-b37e-560dff6e714f/sumip.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_2ffe782d8bb64ab48578fe9f6522d455.pdf?index=trueIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_d2aaf2a250dc4fb8bee37ef526600727.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/828859a2-9949-4936-a511-fc85fb14efa0/a_spy_in_the_house_of_love.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_0686f9c6487b4dfcab712d614d96b63f.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_9a56c7a599c447f6b244c1378fb0cfbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ac79c9-e474-4fed-a00f-db2258e12406/vaperunopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654d4622-cc41-4b8f-86c1-fb33d2d570e5/haz_llover_vino_nuevo_letra_y_acordes.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_2e30a0db9653419f98f938d65b8a2e7f.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB0 5224 bytes
SHA-256: 91bc2f28d3f0216af26c0f4cd5177670e7ce2d25d4dc6397657e7c3a76e0d5fa
font_01_sfnt_off00012c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C59 10920 bytes
SHA-256: c00c05633e17328873652c49b140e2b396a2c9ad050fa86d9ca407a9e765e277