Malicious PDF — malware analysis report

Static analysis result for SHA-256 8246a1fb82e850f4…

MALICIOUS

PDF

81.9 KB Created: 2021-04-22 18:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e9475932064d7d7402d8f2535674d7ac SHA-1: 691a898125c36a8a0d8a0528b6ed509b299cb4c1 SHA-256: 8246a1fb82e850f4414308f018cede46979db7c563641862d3955f9383b8f239
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. The embedded URLs likely lead to malicious or phishing sites, aiming to trick users into revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=vedic+astrology+marriage+prediction+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490266/normal_5fe2a9781b14a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_6030d65e0ba12.pdfIn PDF document text
    • http://losmopaka.site/sinitukejuverudulunutapij3ki6x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5fdf8e36d3ac6.pdfIn PDF document text
    • http://1fps.ru/fasiguzutagekekilelao538i.pdfIn PDF document text
    • http://niwagiw.22web.org/19350387068.pdfIn PDF document text
    • http://metalllift.ru/47441355755jpxpp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405437/normal_5fde1ec4cdd97.pdfIn PDF document text
    • http://dixuvexawob.22web.org/33058691684.pdfIn PDF document text
    • http://namelesssouth.xyz/vajerekadaxezaziwalipoj4sis.pdfIn PDF document text
    • http://subfamjtii.site/pexezcjhhj.pdfIn PDF document text
    • http://axecheat7.xyz/garmin_g600_for_salejtt1x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_604d8de4dac47.pdfIn PDF document text
    • http://pressit.space/best_oil_for_honda_6500_generator2v3us.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/a7eaac31-f805-4da4-9a95-72337290d456/xanifuxazazurixo.pdfIn PDF document text
    • http://subipugexenijok.rf.gd/does_islam_prohibit_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a77afdb-658e-45c4-8a3a-a8978f902f51/can_you_break_your_lease_due_to_covid_19_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20e388b3-c9ee-4ce8-8096-6d44527c6719/experimental_organic_chemistry_6th_edition.pdfIn PDF document text
    • http://boxemoje.epizy.com/loading_button_android_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ca36b5-3f99-496f-a951-ff01083df398/the_intelligent_asset_allocator_summary.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_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 5540 bytes
SHA-256: 119e2152da0c4518b59cd0cf736eb2278e55bdc5aac1dd6755d81d7268102093
font_01_sfnt_off0001166d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166D 10368 bytes
SHA-256: 456d3dfc90b043b4f5a131eaa47f6bddb86137392403c1fbded66544ca7a8aca

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