Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ed4714bf6c56b3…

MALICIOUS

PDF

82.4 KB Created: 2021-03-19 02:49:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: df0b11eeefe6d5704187eca307789251 SHA-1: b6b4a3501620fd9070b5e31efda661b7cb3dda78 SHA-256: d0ed4714bf6c56b3a496f908bcadf3a9d99a044ef9f8532385f8bfa17810a596
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'gimoguvi.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=rope+knots+for+tree+swing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460463/normal_6023b7d5399e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462344/normal_5fdbc584477a5.pdfIn PDF document text
    • http://arnautmebel.ru/husqvarna_yth24v48_carburetordvh7v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_6041ee7dc8631.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/jelelutobevuwawalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446379/normal_604184369c397.pdfIn PDF document text
    • http://visionnew.xyz/minions_full_movie_3gpt0k2v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482230/normal_604a1c1bb3984.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/kuxifusejaf.pdfIn PDF document text
    • http://delalikifavaru.iblogger.org/easy_classic_rock_guitar_songs_to_learn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gemosufijubimup.epizy.com/crime_patrol_2019_hd_mp4.pdfIn PDF document text
    • http://xorinonaf.rf.gd/92350787596.pdfIn PDF document text
    • http://jikibepedoroto.epizy.com/vijay_awards_2007_full_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b43a1bd-e02b-4f66-bed0-764b4ec56adc/xutizosuxuxidi.pdfIn PDF document text
    • http://rojetakaju.epizy.com/10416516005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3092aff1-1965-4a88-a25c-2ea487d745d2/14417787756.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/72304576869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceec4de0-0c7e-4ce0-a29d-98922eae0a91/nobazipanosepanirovore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce885ef-c5b7-41be-aea0-39e8b3310462/how_to_fix_rock_candy_xbox_360_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe40803-606b-4bf3-810a-31161fb9358a/clasificacion_de_las_funciones_calculo_diferencial.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_off000104c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C9 4988 bytes
SHA-256: b1725a34110f6f62655cb645319c8dd3deaf082cae29a9be5b200231495b9959
font_01_sfnt_off000115f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F7 11460 bytes
SHA-256: aa15245ef47e55e3bd4e534d2894d37a236f9d8e6b462cf3294dda19aa971eac

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