Malicious PDF — malware analysis report

Static analysis result for SHA-256 295ad693eddb8df0…

MALICIOUS

PDF

79.2 KB Created: 2021-04-01 23:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 67eccc25e0f5d1232c621e27b74d021f SHA-1: 513be9e63286ecabdd89f08895519373ec9b4b5e SHA-256: 295ad693eddb8df0d735f201ecb27fc36fcfd434e1a60b70913a95c4b0940413
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=augustine+confessions+chadwick+pdf PDF link annotation
    • https://cdn.sqhk.co/sosobigawe/g79XjiF/99461802854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_6059ff4ad42e6.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/hcjhcjc/warlings_armageddon_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/2Kijaig/46144310000.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470821/normal_5ff9ec0044dd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377125/normal_5fe56e42061a9.pdfIn PDF document text
    • http://sadogiropi.mypressonline.com/athlean_x_bodyweight_workout.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/hupUbib/65625267140.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/adverbial_phrases_exercises_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/ciiYged/93610610081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazepoxi.atwebpages.com/logical_thinking_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad2d075-2ee2-4472-b134-2e7a765a7b25/30240691247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7356da17-357f-4884-aabd-ca6db4f37a08/how_to_find_resistor_color_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7acfcea-c7ca-49d4-bc79-87b882e18400/sosunimatezuxeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3fae70-e547-4022-b2c1-323631d5fbdf/sexual_reproduction_definition_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495a22d5-777c-4691-8b37-619b7330d813/ritofikosevum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70265cdc-5e39-4028-859a-0f0cd8116b34/25531592983.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/70410573402.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/larogixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85fbb2b4-fadf-4553-aee0-d3a396ee3605/how_do_you_pair_onn_bluetooth_in_ear_headphones.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_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 5436 bytes
SHA-256: f408d260a11887c8c77420b51004064aa0392135e5f84bec0d712e6667840900
font_01_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 11064 bytes
SHA-256: b6d26f0a3b5b3b16b6bed2ae9e36aa139c857ca2d58f13e12e57c2787e628981

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