Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a75a1b469f1908c…

MALICIOUS

PDF

108.0 KB Created: 2021-03-19 04:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7d3035ff3d931e1030503f1167b2dcc SHA-1: b9cef886b5abc4e9fbc3ab790a60f22439c80c6a SHA-256: 2a75a1b469f1908c85a1466bbbf6c7fd16a60db2944423bdb292cbceddc09ec6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spam campaign. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/aws?utm_term=composite+materials+in+aviation+industry
    • https://static.s123-cdn-static.com/uploads/4451027/normal_5fdf0bb282ab1.pdf
    • https://cdn.sqhk.co/delopomixaba/bdhghhe/best_external_power_bank_for_cell_phone.pdf
    • http://boevoenlp.com/logic_pro_x_tutorial_2020tkzcq.pdf
    • https://cdn-cms.f-static.net/uploads/4416805/normal_6025b25a34dad.pdf
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/c3ec4212.pdf
    • https://cdn-cms.f-static.net/uploads/4475719/normal_604339de8c7df.pdf
    • https://cdn.sqhk.co/liregagibago/N3hfp46/blast_furnace_gold_guide_osrs.pdf
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/dipumadomelaveb.pdf
    • https://cdn.sqhk.co/leluforeref/ghOX5qb/cardi_b_noises_download.pdf
    • http://lnstagram-helping.live/whats_leaving_xbox_game_passz2t41.pdf
    • https://cdn.sqhk.co/vobipibomuk/hikV6Vs/82067841688.pdf
    • https://mowavowami.weebly.com/uploads/1/3/4/5/134591552/ropikedumer_vurixidiboxiwi_besijudusa_nowetisos.pdf
    • http://beststudent.space/announcement_departure_employee_templatesicsb.pdf
    • https://cdn.sqhk.co/gidufulelav/sji1tgg/50784187102.pdf
    • https://bavusuma.weebly.com/uploads/1/3/4/2/134265942/798e1.pdf
    • https://cdn.sqhk.co/luwesefizi/Bifzxgi/lemuwasaj.pdf
    • https://pemanawawe.weebly.com/uploads/1/3/5/3/135320082/1c421f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vawoginele/transformers_bumblebee_helmet_voice_mixer.pdf
    • https://s3.amazonaws.com/mozedijiz/free_adobe_animate_cc_templates.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_off000168f9.bin
5684438a043cf50d382165a34abc927de77b2b0d3887dd61fd47ae2ab645eceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x168F9 5172 bytes
font_01_sfnt_off00017a7f.bin
4dda5019e98fd794b1271199a11c5b1fab7f55abe9e2b3b0bc99771bb21d14f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A7F 12036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.