Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9c132698c69b02…

MALICIOUS

PDF

76.8 KB Created: 2021-03-29 01:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e1697c79be835f1cccce4b7ef84bca6c SHA-1: 9e1ef9fd93901fbd46ecd90f10d392f6f56e8806 SHA-256: 0f9c132698c69b0241e113e162c69c33c7ff44028430b867261798a07e1ff955
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. One prominent URL, 'https://zajinet.ru/strik?utm_term=how+to+fix+a+vizio+flat+screen+tv', suggests a lure related to technical support or troubleshooting. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/strik?utm_term=how+to+fix+a+vizio+flat+screen+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405467/normal_6015257d2a59f.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/ridotujavujox.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/gnOKz7r/wallpaper_hd_4k_background_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/mjfhcih/93699466230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_600eba40b7f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_6054d527a7919.pdfIn PDF document text
    • https://kilavolofijon.weebly.com/uploads/1/3/1/1/131164174/latewizaxevi.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/bhjeDcr/unblock_ball_block_puzzle_apk_indir.pdfIn PDF document text
    • https://wazemuguv.weebly.com/uploads/1/3/4/4/134489137/2fe46.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/wededezedelepaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_601b45d54a0f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_603c4d12b8735.pdfIn PDF document text
    • https://jegobegopij.weebly.com/uploads/1/3/1/8/131871729/murav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_60400501e65d6.pdfIn PDF document text
    • https://redelonoxoti.weebly.com/uploads/1/3/1/6/131606094/6004751.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/enpR75u/metal_boy_dog_names_that_start_with_b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410965/normal_5ff1c9891d1e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_6032f13a752c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490266/normal_5fed3c7e4dfa3.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/mulerux/glassworks_floe_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/dikolapasirugomosewobeviv.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/how_to_use_think_pair_share.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/78108851711.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/talisitifasozerimagabi.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_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 5108 bytes
SHA-256: 400ec412a0d4bb2977c8adbf47703730a3dcb5905f1de138e176e770ecc8f658
font_01_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 10132 bytes
SHA-256: 9765130a203ab019645f4d8000fcbe444744fa2122858a1794d6be789a460122

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