Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e7742d42572db7…

MALICIOUS

PDF

75.4 KB Created: 2021-04-06 23:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: afb349b015cf5567b990e049bdeb45a9 SHA-1: 57d8dcb65d561b6d9e9e228ab356ac0c34dd8123 SHA-256: 94e7742d42572db7cbb1afa3bfa5384e6baea51512451ed630989e061bad7ffd
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://golowaki.ru/strik?utm_term=kenmore+quiet+guard+dishwasher+won%2527t+start PDF link annotation
    • https://cdn.sqhk.co/likamigid/ZlbExrw/mr_ed_jumps_the_gun_smoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5fe65e8dba0af.pdfIn PDF document text
    • http://ridunculus.com/41254899716248gv.pdfIn PDF document text
    • http://stingeksoj.online/chronotherm_iv_plus_manualrqma9.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/WskgPgc/kubufikafixotur.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/vjdxagi/simple_cake_decoration_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489247/normal_5ff9b62fce4cf.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/aidiaFX/6040502795.pdfIn PDF document text
    • http://getveran.site/21918009464z3n5g.pdfIn PDF document text
    • https://cdn.sqhk.co/kefaforuletu/jbZieEk/easy_origami_shirt_and_tie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388820/normal_5fed7ed1e97cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5fe68ae79893a.pdfIn PDF document text
    • http://good-production9.site/graphtec_ce5000-60_manual_espaolh755l.pdfIn PDF document text
    • http://kungfumalibu.com/facebook_for_macos_mojavems1rd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374839/normal_5fe00ecb6e2a1.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/c4d1672b-dbe4-4540-812c-0e9d453000a4/what_is_qms_in_quality_assurance.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_0bca7284a0134be7bd2c49d1aa9d19bd.pdf?index=trueIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_295f1e6b07ab4fd1b3ad96ae56a3e227.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e6e8fe-e368-4577-8b02-80d7c19d48b0/igloo_mini_fridge_with_freezer_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9c27aa-c138-48a5-843c-ed01125ac007/balur.pdfIn PDF document text
    • https://3b1a0cff-dc54-4917-88c1-cdf904a8db56.filesusr.com/ugd/60aab8_b189ce3011334dd6ae21918ee045bf41.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9c60a3-f8e3-4073-a912-1a8ea516a554/94264011503.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_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 5428 bytes
SHA-256: 5fdffcc1cc87fc8f8703fd07860b34f10687b71474c9cbca6695bbb0a7e02126
font_01_sfnt_off0000fa4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4F 11252 bytes
SHA-256: 6510b6d04f249cd0151327ad90ff767b3eeb7df9cb316f68e9869d6f3048084e

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