Malicious PDF — malware analysis report

Static analysis result for SHA-256 499a96dca29f4011…

MALICIOUS

PDF

96.8 KB Created: 2021-06-06 08:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: caadae842d1b4c13e4c7669b9ed29ee2 SHA-1: 69e88a60cce7187f7bf9e8b123748af9dac3b073 SHA-256: 499a96dca29f4011df1c10670ffd5d8a259c44eb459fb71ed4f7b81050d0d570
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to direct users to malicious websites.

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://pistant.ru/pbw?utm_term=news+about+learning+styles+in+the+philippines PDF link annotation
    • https://womevelem.weebly.com/uploads/1/3/2/8/132814223/c4c2a42610bca.pdfIn PDF document text
    • https://tosofeguwus.weebly.com/uploads/1/3/4/3/134321705/4523420.pdfIn PDF document text
    • https://limumowitizuwag.weebly.com/uploads/1/3/4/5/134587832/4927967.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448535/normal_5ff22ef5e9831.pdfIn PDF document text
    • https://xetibipu.weebly.com/uploads/1/3/4/5/134528590/3158309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470542/normal_60061d7abf9f9.pdfIn PDF document text
    • https://jezagegilefu.weebly.com/uploads/1/3/4/3/134307882/7828586.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5fceaa7f71f8c.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/gofese.pdfIn PDF document text
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/vubegitori_buxit_wurepekuz_fakuxifirekiret.pdfIn PDF document text
    • https://zavitakeji.weebly.com/uploads/1/3/4/9/134904790/8491770.pdfIn PDF document text
    • https://lesoloruvurer.weebly.com/uploads/1/3/6/0/136028926/badumu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_5ffe5364abf59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472768/normal_5fdf072a93cea.pdfIn PDF document text
    • https://nibebelijatod.weebly.com/uploads/1/3/1/4/131452937/xatog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mutoteja.pbworks.com/w/file/fetch/144505638/kuwasawabuzupavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f49a72b-2803-46e8-991a-d417f5fd6e02/30255938015.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/37378335532.pdfIn PDF document text
    • http://wenitat.pbworks.com/f/36108447991.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/f/62887581240.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144470184/78915020964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a6239a-7ead-42ea-b382-b8aa6a57b2ad/brother_hl-2270dw_ethernet_not_working.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_off00013a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4D 5384 bytes
SHA-256: 871839a9cb474bcac795117fb72e35f20faa611c66cb9a291a30d7d417402676
font_01_sfnt_off00014caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAF 11752 bytes
SHA-256: f55ba06f9defaf795abec745efdc972e704d095c6f94a7ca857ddf31470d45d7