Malicious PDF — malware analysis report

Static analysis result for SHA-256 3794d04045182ef6…

MALICIOUS

PDF

115.4 KB Created: 2021-03-22 09:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 923425ab3a72c93ebec89f9786619017 SHA-1: 506b21117f615529d4877f66c54c89e91d86f64d SHA-256: 3794d04045182ef6f6b8430ae55faf92cd33e4f9505e6a9b1eac13ac9be59b29
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 0.9996

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://golowaki.ru/123?utm_term=elland+road+away+fans+guide PDF link annotation
    • https://cdn.sqhk.co/liripudeb/Fs1jdih/in_god_we_trust_into_latin.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/miguiet/transformers_earth_wars_optimus_maximus.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/v3fGih0/bass_pro_shops.pdfIn PDF document text
    • http://donobidabi.22web.org/41623742664.pdfIn PDF document text
    • http://xevozunufu.iblogger.org/34147394612.pdfIn PDF document text
    • https://cdn.sqhk.co/jafakitiw/ghKqlwv/wukoro.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/ciejjR8/pokemon_tcg_online_codes_free_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/hgghbid/bemowobizibubod.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/Aiggggg/rojawazenomajonijevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f940642-8719-4c35-966e-80d3e2269bc5/how_do_fighters_cut_weight_so_fast_reddit.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_55857da49133438287f3ed9fbffa9dc8.pdf?index=trueIn PDF document text
    • http://puzexexaniledow.epizy.com/boosted_performance_mooresville_north_carolina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e46ca6b-009a-4987-b54b-d153024b39ed/14824316551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7701c915-24c6-485c-b8c9-0d7419e67605/xugojibuzemanenopitubezef.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_83c1517c8f444214b4b36b98e6b75100.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1338ae7-49ad-4882-8bf5-df5934d82f16/how_to_draw_manga_female_body_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd04566-3595-47e2-a317-86356621a794/my_ego-t_battery_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5bf334b-6a08-4200-9383-5dc81d02e907/zawezufidoxodi.pdfIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_566b5cda8fa142f0a5b637b67c746c84.pdf?index=trueIn PDF document text
    • http://pobediwawe.epizy.com/animoto_full_crack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ceccd69-ea7f-482c-860c-d963a73fe3cd/3_words_that_describe_me_dating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d819fe2-4ffe-4a12-b85c-c95975061111/worovamonexuxirutarixoge.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000185bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185BB 5224 bytes
SHA-256: 0b7ab73cb2239237444ed518af0500fd363dffc6e501ad2a5ebc62c1d415a5b1
font_01_sfnt_off000197b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197B4 11848 bytes
SHA-256: 5037798a58a6dff722f71c49bf88c949ceab87c2b638600c52f35de70d54c51a