Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa22498916399657…

MALICIOUS

PDF

77.6 KB Created: 2021-03-20 00:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ae5d8e6984ae569dba9a43416f6979f8 SHA-1: 522fdf31aa9952c40422f11a067b11c4a16427ae SHA-256: aa224989163996576692d4152ed720959c0801790bcaf3997ae49e22aac0625c
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 0.9991

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://ponafet.ru/award?keyword=reading+and+writing+skills+pdf+shs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fd17e6dacc63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_60377e768e4d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472491/normal_5fef53d95f47d.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/new_york_dma.pdfIn PDF document text
    • http://toppiksnack.xyz/segotewabxa2p8.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/49797262007.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/KGpBMih/89000497213.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/hjqjtha/1133902430.pdfIn PDF document text
    • http://espaceclient-cmb.com/gadanigunalofoziwq36uu.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/VPB5icx/wagulexajijomekifizomeku.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/36658051418.pdfIn PDF document text
    • http://mpvideo.org/bts_best_songs_playlist2yddf.pdfIn PDF document text
    • http://m-laskin.ru/lolupo5cetg.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/TuZtjaI/youtube_rocketman_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/SijgeO9/putujegeno.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/84vicS6/vaxagoxawimiravesu.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/RGV1Ihc/destiny_2_outbreak_perfected_quest_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_604dd70f7a83d.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/cZQyYMZ/32530579916.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/cieecij/vr_lenses_fogging_up.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/hric1gd/music_theory_games_app.pdfIn PDF document text
    • http://ripugusulufiluj.getenjoyment.net/housing_act_1988.pdfIn PDF document text
    • http://gnatural.space/macmillan_english_5_worksheetstrtdp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 5464 bytes
SHA-256: 92970cdf8315850155d00887641fde4422d238f9dd253dc501c64fcc50960416
font_01_sfnt_off00010468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10468 10756 bytes
SHA-256: 792d4f932cb3dddd74b22f9423a6920f90775ad764755c5f8737918053d3bb35

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