Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fae9a946bb177da…

MALICIOUS

PDF

85.2 KB Created: 2021-03-22 13:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 255e1d9a8de9ca47d9c7964a85ab2771 SHA-1: 1a8cc425ba2ccd1054ba020fd87ed08ffa1235ef SHA-256: 0fae9a946bb177da689696824ae2b7ae7c9da3279c625c05fe524637ce0e5f7f
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicative of a link farm or SEO abuse. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://lozipotod.ru/aws?utm_term=olympus+om+1+battery+check
    • http://1ux.site/tunekaviwoderekokovogezubkf5fm.pdf
    • http://cardio-active.site/encyclopedia_of_chart_patterns_espaolh1r8s.pdf
    • http://mnogolidov.xyz/lusamesikukewo2gta8.pdf
    • http://wojazilasifef.iblogger.org/comment_assembler_deux_mac.pdf
    • http://lesagotefawa.22web.org/18236280186.pdf
    • http://naturalgood.space/zoxisukebuc7apj.pdf
    • http://zoomita.space/beats_solo_pro_blue2om1o.pdf
    • http://urro-hu.com/jinoduginofefaradfoie9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_bea9f24694d141e4b76e37d961c57ef1.pdf?index=true
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_15cdec4e048e4c1bbdd691b988b3cec1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/44bfb58d-ac7b-48c6-b5f6-c07f099fc000/langston_hughes_high_school_death.pdf
    • https://uploads.strikinglycdn.com/files/ba48f27d-8e30-4481-b561-31069652bb47/ingo_swann_remote_viewing.pdf
    • https://uploads.strikinglycdn.com/files/dc220b27-e0d7-45f2-bf3a-f269e701c305/mesigixevemosigo.pdf
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_15517a48128b42b6bf64c03fc8144790.pdf?index=true
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_dce6332b41264c9792e82d1a4ad13d34.pdf?index=true
    • http://tiluremuxaz.epizy.com/i_feel_good_trumpet_sheet_music.pdf
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_692515097b0142bc8a023041c198ecf5.pdf?index=true
    • https://ad646471-8556-449a-8150-55a6f6ff724f.filesusr.com/ugd/7a1c5b_e50ba52fba874c6aa037e44ce07beb80.pdf?index=true
    • http://zuzofigub.rf.gd/87523471288.pdf
    • https://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_6be0f002ab51457fa48139b43ef56ece.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f76a.bin
a8ac775817c6e7b4ca6f62bf43c8e47a16443be5f9801d00a14d9ea74b85170d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF76A 5560 bytes
font_01_sfnt_off00010a28.bin
5808c3751147dcc6b3310ff715c6852aa99fcf45ff349d38fa6d8450ea8c363c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 11148 bytes
font_02_sfnt_off0001301e.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1301E 16204 bytes

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