Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3a5a65937244d6…

MALICIOUS

PDF

46.6 KB Created: 2020-11-06 15:28:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f552ec26aef0b42159c81e1d34e0b15 SHA-1: d779ed057cccf03f487ee3473826501bc1ddf73d SHA-256: 5e3a5a65937244d619fe515972471066447be53118505cb2e5fc64c9fe4f4832
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffnew.ru/strik?keyword=pioneer+deh+p6200bt+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410727/normal_5f96ce36ad912.pdfIn PDF document text
    • https://melubezu.weebly.com/uploads/1/3/4/3/134311229/faxipidunetu_xupijipudel_kekinobuwovilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f9d7daecfa9b.pdfIn PDF document text
    • https://fijuwokokaku.weebly.com/uploads/1/3/4/3/134382009/lumirun_kenivi.pdfIn PDF document text
    • https://gogozugibijom.weebly.com/uploads/1/3/4/3/134369614/wilobaxiw.pdfIn PDF document text
    • https://nibawomufexax.weebly.com/uploads/1/3/4/3/134371272/wavutevekisutowev.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/e126f88181bc08.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/c8ed6c16-f1f2-4e37-8ad5-26a02c79a777/visujijojuxodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deadbd7f-0758-45a0-a345-3c37173b9515/fakezakafonogevotexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29141fcd-0827-4ebf-ae4a-9cd1623bf197/wowuragilifukixudezaxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a33c2e-940a-4190-bb7f-9955498d45f9/zero_suit_samus_naked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a896eb0-88a5-4260-88cd-7ab15fc3fef0/gracie_combatives_36_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/jhalak_dikhla_jaa_2015_start_date.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/caboose_interior_drawings.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7648 5588 bytes
SHA-256: 0d1a74bf48f540ce18af7bdd75d7b7c0c260ba5db6cd514be226bbd7be1c1a10
font_01_sfnt_off00008912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8912 10692 bytes
SHA-256: fce17a57bb96b5c3e4883186ac0ff07337c4215b7af863efcfc211291c2a8a07

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