Malicious PDF — malware analysis report

Static analysis result for SHA-256 199b172cc41770ed…

MALICIOUS

PDF

76.1 KB Created: 2021-01-08 08:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a75ab14cb67733eb963c87ed3c5d1a10 SHA-1: 6beab31db792e5ea6c99fbdd13760d9439dc8420 SHA-256: 199b172cc41770ede18816c1a85fd840f8c035efc4009c0301f99627a7006432
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=affirmative+form+simple+past In PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/datoronobapir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378164/normal_5fc7ff9869973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f88955a06df4.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/jimefuxo.pdfIn PDF document text
    • https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/7670828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416935/normal_5fb2ab807ac53.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/5293397.pdfIn PDF document text
    • https://dezazobe.weebly.com/uploads/1/3/4/7/134755526/wasikiwuxebam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fcbf08c4ab0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc058114-d28b-407c-b6f1-9bd99771523c/west_warwick_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50987b50-d55c-408f-a459-1290cb70fb25/southern_indiana_retreat_centers_bayfield_co.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2797b3a-e8f2-477a-ace4-7769fd2b1ae0/knives_master_knife_throwing_game_app.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD538 5096 bytes
SHA-256: e5ed77eb3866e0775b72a007064f0f330f2cfd2eac977c207b2c509fedb6f220
font_01_sfnt_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 11684 bytes
SHA-256: a809d2ce904ce25b0e123138d88352a636f3683d3d49e732b54989d9e9aa552f
font_02_sfnt_off00010cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF8 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

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