Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61b08c86fcda948…

MALICIOUS

PDF

78.0 KB Created: 2021-02-21 22:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 96354782cdcabf3d2f4aec93cb449942 SHA-1: 5a4597d915186d87a378cef98799ee8b0d63396b SHA-256: d61b08c86fcda94851bffd54266c68d8f7c24a0265f5a537cc5b42355fd3f7e6
126 Risk Score

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, many pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, identifying the document as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=republic+of+tea+matcha+singles PDF link annotation
    • http://blue-tick-central.com/55489554668js5i1.pdfIn PDF document text
    • https://cdn.sqhk.co/ledivure/8xjihhI/remavaguvokub.pdfIn PDF document text
    • https://cdn.sqhk.co/dobexesi/X5LNViQ/township_game_tips.pdfIn PDF document text
    • http://esagafow.fun/tejirazudixgkc5k.pdfIn PDF document text
    • https://pusuxefemaj.weebly.com/uploads/1/3/4/1/134108889/boxatavilefi.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/e094c3.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/NgdL8jg/89833550993.pdfIn PDF document text
    • http://prod-fruit.space/250778394424b0lt.pdfIn PDF document text
    • https://zibataluguxomi.weebly.com/uploads/1/3/1/3/131382491/e6514f218792d16.pdfIn PDF document text
    • https://jutikuned.weebly.com/uploads/1/3/5/9/135966087/kuvofibifuseniliz.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/macario_bruno_traven6betc.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/mhcPhb3/83401644222.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/ihcnD4d/rgb_hex_color_picker_online.pdfIn PDF document text
    • http://supsun-aero.com/zavanolizi84922.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://filubukuwewe.epizy.com/toxiv.pdfIn PDF document text
    • http://lopitidelawexe.rf.gd/new_holland_tc30_salvage_parts.pdfIn PDF document text
    • http://dujawupiraxep.rf.gd/modified_bromage_scale.pdfIn PDF document text
    • http://zisigogemewuju.epizy.com/bighorn_19ecb_safe_manual.pdfIn PDF document text
    • http://gepuxaxevo.rf.gd/ortopedia_pediatrica_staheli_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/baferapijitedofa.pdfIn PDF document text
    • http://mewumajobivu.epizy.com/into_the_woods_script_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5360 bytes
SHA-256: 3b95ec10e5a2bbcccd7cc4dcdce2bc001a0a79e9c045826650196b5a9ed0ddf4
font_01_sfnt_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 10184 bytes
SHA-256: d36ebf987a3aa935c29e00feabbecd171182326763cdb835b2dac2220feef306
font_02_sfnt_off00011c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C44 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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