Malicious PDF — malware analysis report

Static analysis result for SHA-256 747026808a31cb11…

MALICIOUS

PDF

83.9 KB Created: 2021-05-04 10:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d683c87d8d6ba5d8b8959c26eb8dff7 SHA-1: 45582b92eb1b874378c2666c498e784002677f5f SHA-256: 747026808a31cb11aea587ed881a95cb715230d83dca8ac7cd53820c2a6ed61c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, identified as a 'PDF link farm', suggests an attempt to direct users to potentially malicious websites. The ML classifier output of 0.999712 further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=2004+ford+focus+zx3+hatchback
    • http://intekzafast.online/why_does_my_petrol_hedge_trimmer_keeps_cutting_outmt72e.pdf
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/b09dbb0f.pdf
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/vubukeruvupowixu.pdf
    • http://fobexometoparu.iblogger.org/swahili_dictionary_offline_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4420775/normal_6049f3de84c15.pdf
    • https://denesibupu.weebly.com/uploads/1/3/0/7/130774977/zubibepogonox.pdf
    • https://cdn-cms.f-static.net/uploads/4468255/normal_60353f8217697.pdf
    • https://cdn-cms.f-static.net/uploads/4370073/normal_602f471eeff3f.pdf
    • https://static.s123-cdn-static.com/uploads/4420752/normal_6000f03b50f2d.pdf
    • https://static.s123-cdn-static.com/uploads/4449622/normal_5ffdaf3f01ff5.pdf
    • http://mmamba.ru/babulal_nagarmal_satnalika_foundation_scholarship_2018tg5j0.pdf
    • http://sarkife.site/caller_name_ringtone_apk9j3mh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lulanikigog.epizy.com/pdp_afterglow_headset_manual.pdf
    • https://uploads.strikinglycdn.com/files/145ea97c-ca29-4e3b-be29-cecbc79b73ea/self-discipline_in_10_days_how_to_go_from_thinking_to_doing.pdf
    • https://uploads.strikinglycdn.com/files/e2035b18-7e0b-415a-905a-0b79c9feb0e3/47330094392.pdf
    • https://uploads.strikinglycdn.com/files/1820091b-bedc-4561-969b-372a5a29c3ec/fetikaxulovo.pdf
    • https://uploads.strikinglycdn.com/files/bd091f8f-2328-4ffb-a76e-c68456b65911/critical_analysis_of_hills_like_white_elephants.pdf
    • https://uploads.strikinglycdn.com/files/9520c72e-586f-4ab0-9bf7-9cbb575fb68c/62033015748.pdf
    • http://bawexoji.rf.gd/78166820941.pdf
    • https://uploads.strikinglycdn.com/files/a57783d6-dd75-4163-b378-997bc8e6fa15/how_much_does_mercedes_maintenance_cost.pdf
    • http://pageziwakuvagu.epizy.com/fikavajodopefatinogatirug.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_off0001087a.bin
7e26edba331e1d61efedc112949dff137d736d38a24534276fcefaf82c1c9937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 5832 bytes
font_01_sfnt_off00011c5c.bin
6344dc1e9256dea99fbc2e1de7c5f10db453795fb89639c5f2986a98174995ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5C 11184 bytes

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