Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be807fec71355ff…

MALICIOUS

PDF

78.2 KB Created: 2021-05-01 02:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ec9286652a927a88a29f5d4a03d15c6 SHA-1: 9b566d5e0bb5ddd436492fe8bf6a6b9e041469db SHA-256: 2be807fec71355ff69bc0ca6cdff8e27da739af3a6d09f9e5fc1158e7a377eb3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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
  • 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://jacksth.ru/strik?utm_term=turtle+beach+x42+ps4+slim PDF link annotation
    • https://tubemugipowiw.weebly.com/uploads/1/3/4/3/134345788/japidanupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_6018db6127a2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_6033678b87e14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_60660eba05cf6.pdfIn PDF document text
    • https://poxovoxi.weebly.com/uploads/1/3/5/3/135398301/gunufaze.pdfIn PDF document text
    • https://ruvudiroxutorag.weebly.com/uploads/1/3/0/7/130775702/kifobiwekuvid-sodusiwoj-xivaniki-nixulafaturak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413458/normal_5fe09faf7ade4.pdfIn PDF document text
    • https://lobodilogiji.weebly.com/uploads/1/3/1/3/131382226/2327773.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pagarome.rf.gd/noam_chomsky_sobre_el_anarquismo.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/how_long_does_it_take_to_get_a_placement_in_foster_care.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/cognos_reporting_system.pdfIn PDF document text
    • http://bejumajiluwod.rf.gd/29494621558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8c4cdd-38ff-4d99-b6f9-20964a8c4a3b/sapamexopivapokisederame.pdfIn PDF document text
    • http://nelekilegel.epizy.com/kuwilekez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92f9b3e-060c-405e-a9a0-39f6032b87b0/19711882415.pdfIn PDF document text
    • http://fewenumozi.epizy.com/first_year_bsc_nursing_syllabus_kuhs.pdfIn PDF document text
    • http://vedexokorixika.rf.gd/dudapepewo.pdfIn PDF document text
    • http://tinozireru.epizy.com/bhoot_wale_cartoon_video.pdfIn PDF document text
    • http://kakofuwogo.epizy.com/gowugulovovuv.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_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 5552 bytes
SHA-256: d06154447ee2c112ea75f222f3fb5fc7bd92dcc5f0f62f3b45a20414f4b3fd0e
font_01_sfnt_off0000f5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 25864 bytes
SHA-256: aa6efd380c0d526476ee9b85b63d213974c9620d88c6eb2ba13f1d8bc51f0a31

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