Malicious PDF — malware analysis report

Static analysis result for SHA-256 2465fb5d32981ab6…

MALICIOUS

PDF

87.8 KB Created: 2021-02-14 18:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 86f8fb1579cb91a13039af041f29adba SHA-1: de6ecb61a5df71170de523372b6d8ea77f8bd301 SHA-256: 2465fb5d32981ab6dfc087f556f7d014c6b8a1ffdcc097efcb3d01469f537c9c
186 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 0.9997

Heuristics 6

  • 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.
  • 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/wix?keyword=earn+to+die+2012+unblocked+games+77 PDF link annotation
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/kajifelipigawiki.pdfIn PDF document text
    • https://cdn.sqhk.co/xojurolaruk/Ouhehf0/husqvarna_automower_connect_home_bluetooth.pdfIn PDF document text
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/431f36a0ed.pdfIn PDF document text
    • http://winoorama.website/901042642565w7df.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/g8khckw/standoff_multiplayer_hack_version.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/bie8ibu/there_you_go_lyrics_johnny_cash.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/LYugjhj/age_of_empires_2_hd_cheat_engine_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/xadopazo/mdicge3/pabewaf.pdfIn PDF document text
    • http://gufutaca3.xyz/rupezijojutebekaxs7wl.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepelela/CLhhcjc/36231132742.pdfIn PDF document text
    • http://bionatur.space/collar_t_shirt_template4hn3l.pdfIn PDF document text
    • https://kaxobemux.weebly.com/uploads/1/3/4/6/134676595/vositexuborajesoda.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/4Vgcidp/17784800088.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/b68e9e0.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/2294c64a238fb8.pdfIn PDF document text
    • https://cdn.sqhk.co/rujosupatebu/bwjcfyF/9648526045.pdfIn PDF document text
    • http://mediaverifiedbadge.com/township_plays_athol_fugard_downloadg4orq.pdfIn PDF document text
    • http://kind-insta.site/lg_g8_manual5ikgf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 5708 bytes
SHA-256: 539ef7868c0356156a3b0b05dc69f89453586eedd633213394d88b8499680d27
font_01_sfnt_off00011f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F75 10504 bytes
SHA-256: 60f37fa40fedf94bacc4a8ed363615880044b44c6bcda51080039361eea0532d
font_02_sfnt_off00014387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14387 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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