Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc07dbd37d0f5c24…

MALICIOUS

PDF

77.6 KB Created: 2021-05-30 23:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ce7027af1abce52abe8c050d4f2c90 SHA-1: 90762cdb9057ed4845fa6ebd66d0ae9a0b27ae4e SHA-256: fc07dbd37d0f5c24958fe6d20f35ffdbe6900ea318a02cc1915d3762b9c8b0f3
96 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating the presence of external URIs and embedded URLs, with one primary URL pointing to a phishing domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, attempting to redirect the user to a malicious site for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://nipisod.ru/strik?utm_term=web+browser+on+samsung+smart+tv+not+working
    • https://repugololenip.weebly.com/uploads/1/3/4/8/134880500/gikusububem.pdf
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/5133007.pdf
    • https://static.s123-cdn-static-d.com/uploads/4413564/normal_60b1e1e58bbd9.pdf
    • https://lixabepona.weebly.com/uploads/1/3/4/5/134530066/nisowufaxarag-lugixerud.pdf
    • https://vovavurag.weebly.com/uploads/1/3/0/7/130739927/3714278.pdf
    • https://sixupotivene.weebly.com/uploads/1/3/4/3/134305687/94d419e2c0ab.pdf
    • https://cdn-cms.f-static.net/uploads/4485014/normal_601c6ba9ae6dc.pdf
    • https://cdn-cms.f-static.net/uploads/4423732/normal_602d0eef25bfc.pdf
    • https://jemexegotida.weebly.com/uploads/1/3/4/4/134464186/gilej.pdf
    • https://cdn-cms.f-static.net/uploads/4421476/normal_605a5968efd50.pdf
    • https://cdn-cms.f-static.net/uploads/4413575/normal_602b399da09c7.pdf
    • https://pufigisefabu.weebly.com/uploads/1/3/4/3/134351441/tuzuvi_dononower_xudejipijob_zonidux.pdf
    • https://cdn-cms.f-static.net/uploads/4416669/normal_603097c26aee8.pdf
    • https://tepupareta.weebly.com/uploads/1/3/0/8/130814680/f451ef0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2c0c5097-fd40-4492-b633-a6dfc75f1e24/fimuwavusakavepivupifimiw.pdf
    • https://uploads.strikinglycdn.com/files/fb721f1a-a8cc-40da-85c8-9caf3b392440/how_do_you_write_a_counter_argument_in_an_argumentative_essay.pdf
    • https://uploads.strikinglycdn.com/files/050809fc-0c5a-4fdf-abf3-2827da92ae12/gudusajazozi.pdf
    • https://uploads.strikinglycdn.com/files/0fb873a5-f740-4fe1-b62c-379a485d9ff3/rowufetiwojirukunisone.pdf
    • https://uploads.strikinglycdn.com/files/2eff2d1d-abe2-4bee-aca0-f77b49340b77/gisapogekokewugitotit.pdf
    • https://uploads.strikinglycdn.com/files/2cdaf8ab-a605-4dd5-82cc-0a77465aeb90/tuwenomimumigixolibi.pdf
    • https://uploads.strikinglycdn.com/files/0dc3d55f-2cf0-434f-ae7c-4180d1721b27/80903840422.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_off0000f197.bin
f3fd10f80c5f00236f103f7656bdbe90f86fb4cf6eca58274ad3b7c00c58f305		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 5340 bytes
font_01_sfnt_off000103ce.bin
874961641db1454ba9eb0d7e6236d6f1c5e8d1a6b58d4c2aeb0d4f67a3be18d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 10940 bytes

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