Malicious PDF — malware analysis report

Static analysis result for SHA-256 69590ea46bd672ec…

MALICIOUS

PDF

80.6 KB Created: 2021-03-18 03:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b313ac9fbf3a4306f7056c27440d959f SHA-1: 02b633961c8b49759c7db8df8ce8d4a5892985b9 SHA-256: 69590ea46bd672ecafe95c8f490864362dd6ffd5868b6ca0a7dc47218e4338d8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to a link farm hosted on Weebly and other services, suggesting a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection, likely to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://golowaki.ru/award?keyword=classifying+triangles+game+pdf
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/vifut.pdf
    • https://zaxadumumuguxe.weebly.com/uploads/1/3/1/4/131454216/1725554.pdf
    • https://feboratopaw.weebly.com/uploads/1/3/1/3/131383734/tijijenobujepo-rafeg.pdf
    • https://wajodiladifaxuv.weebly.com/uploads/1/3/4/7/134768632/xasamapenelefijuruj.pdf
    • https://cdn.sqhk.co/nimabugokofa/jeghhjW/electric_guitar_kit_with_amp.pdf
    • https://cdn-cms.f-static.net/uploads/4380887/normal_602750df34c4f.pdf
    • https://cdn.sqhk.co/mogizufofuj/ghig7hj/neon_city_lights_lanka.pdf
    • https://sawuzirerepobod.weebly.com/uploads/1/3/4/0/134040369/sasomave_lupoduborewusi_dewuroxoso_xabodareza.pdf
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5fe87e542de90.pdf
    • https://cdn.sqhk.co/kevapaboxer/pjjidDO/winklevoss_twins_bitcoin_worth.pdf
    • https://cdn.sqhk.co/wekaradukuve/aSq8Zbs/71180904846.pdf
    • https://cdn.sqhk.co/satukevaguka/gFwxMib/atlanta_braves_ballpark_name_change.pdf
    • https://static.s123-cdn-static.com/uploads/4427076/normal_5fdf2ed2a505e.pdf
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/suxafisifimuxolor.pdf
    • https://xaxepilote.weebly.com/uploads/1/3/4/2/134265473/gazosunevefenuduwo.pdf
    • http://www.dalamatiacity.com
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tereralubo.epizy.com/the_amazing_spider_man_2_apkmania.pdf
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_3d6cdf89e6d846858c46a6d9a366d41c.pdf?index=true
    • http://bodiluduf.rf.gd/what_will_a_2000_watt_inverter_generator_run.pdf
    • http://kofupugixujodin.epizy.com/66524379692.pdf
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_b02a5e6b55dc4338965a79ca39ed5145.pdf?index=true
    • http://gipunofagewux.epizy.com/what_is_rhetorical_devices_mean.pdf
    • http://botejesojami.epizy.com/hernia_gigante_abdominal.pdf
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7a.bin
13febd2e64b8645626816d34bdcf74064663a4035f7c53ec4828803f83e5ef7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 5368 bytes
font_01_sfnt_off00010eb3.bin
7a27a3b3c1b63861e3419d66f5f23c028046f149b74522f94bca8a33d3c94a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB3 11300 bytes

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