Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abdac97503b9f4b…

MALICIOUS

PDF

75.2 KB Created: 2021-06-12 16:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 56ed7da3da404674c54c6a082125dde4 SHA-1: d034be52c012ab423ff641cb63ec4b680b6f1926 SHA-256: 5abdac97503b9f4beb515561e4c77cec63659008243842df049914bed61ea822
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 0.9996

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://medvor.ru/pbw?utm_term=fifty+shades+songs+mp3+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409096/normal_605fd0ee9af62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5fff4dfcd5735.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4498971/normal_60b508f984636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_60c16f775f910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fd31b9736f09.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/29bab998-17b9-46e1-8218-ad6d430e9be7/big_fish_market_menu_moreno_valley_ca.pdfIn PDF document text
    • http://boxedaw.pbworks.com/w/file/fetch/144682860/rovozefodikoxupet.pdfIn PDF document text
    • http://negaboxa.pbworks.com/f/guide_rock_nebraska_murders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071a104b-ccb2-4ec5-b7fa-57fdb3fdf9c4/pewelopi.pdfIn PDF document text
    • http://geviwesizar.pbworks.com/f/ibis_paint_pro_apk.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/engineering_drawing_by_kr_gopalakrishna.pdfIn PDF document text
    • http://rimogeto.pbworks.com/w/file/fetch/144652911/30804950274.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144413961/do_graphic_designers_make_album_covers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed420d7-ffbd-4359-9863-1468582613d0/69509257681.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/79548927648.pdfIn PDF document text
    • http://bulezesikur.pbworks.com/w/file/fetch/145166796/dark_ages_v20.pdfIn PDF document text
    • http://xegosigex.pbworks.com/w/file/fetch/145106310/gift_code_goddess_primal_chaos.pdfIn PDF document text
    • http://gaxoxim.pbworks.com/f/nadasoba.pdfIn PDF document text
    • http://bemuduladiti.pbworks.com/w/file/fetch/144913404/double_entry_bookkeeping_practice_exercises.pdfIn PDF document text
    • http://nelivameg.pbworks.com/w/file/fetch/145189836/tenkaichi_tag_team_ppsspp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5b9098-bf51-401d-af03-e9aac3b4111d/tubajugagixegixutiruzawi.pdfIn PDF document text
    • http://vetokariji.pbworks.com/f/best_pvp_primary_destiny_2.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_off0000e6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C2 5672 bytes
SHA-256: c9e609210621de8d28a6ee2dd264ceed15313c10afe2977072802bf79787818a
font_01_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 11476 bytes
SHA-256: 202dc42bc153b70793274b3d7c170f6def805ddcb000349fb2218c97b5976005

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