Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa0338622718f74…

MALICIOUS

PDF

81.7 KB Created: 2021-06-03 01:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f20f877d6fa8eacb19e43b6d720841e2 SHA-1: ed536d7a1cbfa11fde81e272129b8e5a563dc110 SHA-256: baa0338622718f74da5832f44735cdc3ca69025636893fb97ac235242288c069
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, with one pointing to 'zajinet.ru', suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed as a link farm on disposable hosting, further supporting its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/123?utm_term=arti+answer+dalam+bahasa+indonesia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369183/normal_60334e69150f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_602fd2c0a88fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449766/normal_6048eb236c9d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503033/normal_5fe00ca28028b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450636/normal_60692137eafe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461216/normal_6055004b147ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_60313218f0a75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144464580/how_do_i_arrange_an_uber_ride_for_someone_else.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144499131/cosatto_footmuff_washing_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835f24b5-f4ba-41cb-b091-4c4cab385ea1/9701695786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b866eda-d1e5-4841-92bf-4b7d8c865286/how_to_get_shiny_charizard_sword.pdfIn PDF document text
    • http://joxakuruvi.pbworks.com/w/file/fetch/144497850/minecraft_pe_13.0_free_download_ios_no_jailbreak_2020.pdfIn PDF document text
    • http://wisarazed.pbworks.com/f/34233877987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3cd8564-5721-4b51-a366-2c60df5563f5/how_to_do_calligraphy_with_watercolor_brush_pens.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/f/xoret.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/nuzopalokubetoli.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/bibuzusabipataxaxoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb497f4b-2ee4-43c7-903a-e5f62ab98a99/95720589585.pdfIn PDF document text
    • http://nukuxim.pbworks.com/f/how_do_you_unjam_a_bostitch_hammer_stapler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c830af00-d42f-497e-8d4a-c146fc0705a8/are_mcdonalds_chicken_nuggets_keto_friendly.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

Related samples 7

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_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 5284 bytes
SHA-256: f9099849d84d56e8d72cec5d612160f5c3b4feea61ab9e6bcdf866e59df6055d
font_01_sfnt_off00011469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11469 10980 bytes
SHA-256: 1921a421df4311508d45f3b7e30b2c1cde3486636917dcc4ade5fc7c8b9712be

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