Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d32252a4f1543f…

MALICIOUS

PDF

75.6 KB Created: 2021-03-09 19:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fc66b7768c4da2c69b0918541be82fef SHA-1: 46c658a77fe48bd061d0bf23dca8a74e467e18d9 SHA-256: c7d32252a4f1543ff2a89cf73c534b29c11bd035f763d5e88e70121c768a2973
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URL points to 'bologen.ru', suggesting a phishing or malware distribution attempt disguised as a tutorial. Although no scripts were explicitly extracted, the PDF format and the nature of the URL suggest potential for embedded JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/award?keyword=luminosity+mask+tutorial+pdf PDF link annotation
    • https://cdn.sqhk.co/kukelagalefe/ijjjibT/monster_farm_minecraft_1._15.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/what_are_structured_credit_products.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/zero_and_negative_exponents_worksheet.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/jekametazajaxusozamig.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/rufonusomozex.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/gfiizKD/seedship_high_score.pdfIn PDF document text
    • http://digitalmicroteter.xyz/earl_nightingale_acres_of_diamondsr8xvv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_602ffa21b9ea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485689/normal_603ff746e7753.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/free_pre_kindergarten_worksheets121v8.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/namawalobewozujaxifafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_6017d51673f28.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/hDfyIuU/real_boxing_2_creed_android_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/i7TlMTG/land_rover_defender_old_style.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/cards_against_humanity_dirty_version_examples.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/fupezoziroxutududede.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/ThgieiX/game_room_furniture_store_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_60379dfef29f0.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/7f7155b7-c3ba-41a5-b2c4-337c89fc6c28/bodufojej.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/15808750684.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/why_does_my_compressor_not_build_up_pressure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a73ee5a-88ae-4a43-a2e0-c1faf9be8ec7/words_that_start_with_obe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de40831d-6b10-4949-b358-7223ad99f361/recaro_performance_sport_car_seat.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_off0000ea5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 5296 bytes
SHA-256: aa072f2d0d945f1b54cd181442d73fd1e88be99bbd67158dbb16eabd02350c8d
font_01_sfnt_off0000fc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5A 10852 bytes
SHA-256: ef1828ffa34e5f8cc3a52231be6b107245c7426f335f1624af12f867de6c4f44

Open this report in the interactive analyzer, or submit your own file for analysis.