Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e0005966d336e5…

MALICIOUS

PDF

75.5 KB Created: 2021-05-06 04:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1150d08ceb39826e941049234974268f SHA-1: 209b8e9bdb23281da8173e57f7b9f6028fcddd0a SHA-256: 50e0005966d336e5a28969932ae8f908878b35c7db9b6df2e18de83a0a38f1bc
186 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 ClamAV and 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 0.9998

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://druttle.ru/strik?utm_term=how+to+pair+telus+remote+to+insignia+tv PDF link annotation
    • https://cdn.sqhk.co/pozuwifofub/chbK1jg/31278032434.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/gFBQHhh/road_trip_planner_europe_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/b7heZVz/74553424387.pdfIn PDF document text
    • http://mkuu.club/wow_toys_guideciegj.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/epghZ5I/52134766125.pdfIn PDF document text
    • http://creditpm.com/ingenieria_economica_blank_tarquin_6ta_ediciona8joz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_6017b9718590d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479921/normal_602b93928b7c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/pubanogajuwasase.pdfIn PDF document text
    • https://311919ef-92bb-434b-a93e-382c1a5e2e65.filesusr.com/ugd/c893b4_023139ea80c248c184905dbaf84a235c.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_df20345c721f4cb48ce75c36f1dcfcce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/wipojukuwoligi.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_30cc3f99a1484adfbfbb54d0d14d3ed3.pdf?index=trueIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_eac5ac39a7f54422894e1ede8ba2a0b3.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_e9bc0b4ed3fe4b2dbb458f9e974a564d.pdf?index=trueIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_f4c72515e6d84878a3ddf0b83a8e744d.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

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_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 5252 bytes
SHA-256: cbf1534d48f466a8933a8e1ec21ff0e1987b62b77a70f741eeaa320cf612a428
font_01_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 10804 bytes
SHA-256: 035f5309ef2ccfebe28bf0de2723ef0f5a6e301bd8c83958b819e64856163c66

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