Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6c9f2184897bac…

MALICIOUS

PDF

93.2 KB Created: 2021-03-18 00:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9bce1f8e87ddbeebde8ad7f9a0170f89 SHA-1: d697aa7a5dd51836274a640f98af880f1136176f SHA-256: 6d6c9f2184897bac5852789715bb357db192bbb2d9094820fabbd664ec7a9272
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The presence of a malicious ML classification and ClamAV detection, along with a suspicious URL, suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://mezovuduw.ru/strik?utm_term=allan+g+johnson+patriarchy+the+system PDF link annotation
    • https://cdn.sqhk.co/vixukose/geMeBje/3938418846.pdfIn PDF document text
    • https://zikawudewodag.weebly.com/uploads/1/3/4/5/134585044/c4cb3d8056d5ad.pdfIn PDF document text
    • https://musimisipamorek.weebly.com/uploads/1/3/4/5/134594646/9e1de1654ed33a.pdfIn PDF document text
    • https://rujuramokukavet.weebly.com/uploads/1/3/0/7/130739146/vexobufavarobasomos.pdfIn PDF document text
    • https://jovonawokemurif.weebly.com/uploads/1/3/4/6/134678447/musorof.pdfIn PDF document text
    • https://wejumarokurefa.weebly.com/uploads/1/3/0/7/130776247/novorisupe.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/ec74e25.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/giOY5QK/sefijafepeg.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/igcjajb/28128953841.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/V5Cz68V/w3schools_html_color_gradient.pdfIn PDF document text
    • https://cdn.sqhk.co/mutobudenit/hhwja5z/zombie_vs_ninja_1989.pdfIn PDF document text
    • https://pejoguroboxifuj.weebly.com/uploads/1/3/1/6/131637830/7940444.pdfIn PDF document text
    • https://nezubarenegutel.weebly.com/uploads/1/3/0/7/130776328/gisafon.pdfIn PDF document text
    • https://tipuzivi.weebly.com/uploads/1/3/0/9/130969377/nutotukuzef_goruweluxogut_pofigexalu_kuwudemula.pdfIn PDF document text
    • https://tufojeju.weebly.com/uploads/1/3/0/7/130740258/miwisovimisaxozekijo.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
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_008743bf5f8f4714899d31d6af6d131d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fovezewi/faber_chimney_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f572e1a1-a485-47ca-b2ef-c39aa0087ba9/khaled_hosseini_mil_soles_esplendidos_resumen.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_83d8245119a54bbaa4717cacbfb4e69c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46fe826-650f-4a15-abd5-fba61ae6815d/15334388694.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_b192efe1fee5496fa5db02734eb82b11.pdf?index=trueIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_220271114c3c44baa80c110853c2acee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/xoxibija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d42d036-5059-4b8f-acfd-10d5b0dbab74/dell_r710_bios_update_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/zorimoneduzawe.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/nexuzabu.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/46585932105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca14391-b8e2-4f90-9c5b-2c8989c8f5b9/48908302834.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B3 3628 bytes
SHA-256: bf9b5f7839e4b3aae19ced761d5aafa55855e1869c2a34dfebdc64ffb2dce121
font_01_sfnt_off00011db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB2 5300 bytes
SHA-256: 0e77eb488b9a7a7329878071e90620a0b953f6ce185e26fd6b820c7b3b15c881
font_02_sfnt_off00012f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F96 11944 bytes
SHA-256: d959a7c864183f53594d69b0015c4fc4d7ceb6ff1b98357284878d34689f8530
font_03_sfnt_off00015823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15823 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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