Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7924dd906a2751c…

MALICIOUS

PDF

72.7 KB Created: 2021-02-21 23:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 35c6e8443f910db5a017fadcaa95420b SHA-1: d759a050eb917a6a0dfe0e3a4671cc58c74c6f47 SHA-256: b7924dd906a2751c13e3a5e5e2f47cfb346556c0e00afcb3c91928159a511186
156 Risk Score

Malware Insights

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

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=brandon+bernard+story+execution PDF link annotation
    • https://cdn.sqhk.co/sedazozesufu/faJdCEY/jajina.pdfIn PDF document text
    • http://persequenteamsohbet.com/identifying_polygons_worksheet_grade_4icmrh.pdfIn PDF document text
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/fanazamotarixa.pdfIn PDF document text
    • https://cdn.sqhk.co/womelage/5je9Tif/bujojemidaliwopolitipuj.pdfIn PDF document text
    • https://rofizikijomosuj.weebly.com/uploads/1/3/4/0/134012810/janikobukolewu-jiritozipak.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/nWgdjhd/offline_maps_and_gps_offline_car_navigation.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/ropatobuta_pubiboro.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/super_adventure_world_platform_game_downloadfyxqr.pdfIn PDF document text
    • https://pajejasebuwosiw.weebly.com/uploads/1/3/0/8/130813778/wunomefurugux.pdfIn PDF document text
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/jabunimomazedig.pdfIn PDF document text
    • http://kyhni.site/mufipufutikifuzilisidujegj5tdz.pdfIn PDF document text
    • https://gizigega.weebly.com/uploads/1/3/3/9/133999267/bfed03b.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/gtje4ie/vujedivatavuxopuw.pdfIn PDF document text
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/96f09d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/baby_image_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/tobulor.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/nebenew.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/google_spreadsheet_adalah.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 8

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_off0000dff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 5260 bytes
SHA-256: e423a33f9ba8e576da2ec293136f7dc4118d2ad719013cd7316e545530e3bf1c
font_01_sfnt_off0000f1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EC 10268 bytes
SHA-256: 7b2c957bd725a66e015c0624108061ab0f7f0b65a391cf68bf40154b35fbd418

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