Malicious PDF — malware analysis report

Static analysis result for SHA-256 72600522ce933221…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 19:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 001546e366db29cefca3a4b457b3f7d3 SHA-1: 821895a9241445bc675b6e49d7399e0724240ec8 SHA-256: 72600522ce93322168f71d95ed85a17a67767e8e1bc47b8d477f0e7da8647f65
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to product searches, suggesting a lure. The numerous embedded URLs, many hosted on disposable domains, reinforce the phishing and redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=canon+rebel+xt+battery+charger+walmart In PDF document text
    • https://cdn.sqhk.co/rojisixel/Vhbcjjh/favumesetixulafejenug.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/FQhaWJv/76822154330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_601dd81786f01.pdfIn PDF document text
    • http://dobujebenebif.66ghz.com/wesexiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_600e8fcf4d948.pdfIn PDF document text
    • http://bupuxojif.iblogger.org/xazifusibiweduvaje.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvetuzaxi/jJfUWdD/37468212971.pdfIn PDF document text
    • http://chempion.coffee/lizunufudixutdp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_60159fc7bda96.pdfIn PDF document text
    • http://denizan.com/boat_parking_3d2s70u.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/ieMpha0/warrior_notes_tv_app.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/jfjhhai/bumekupuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5feb8e787871f.pdfIn PDF document text
    • http://samozanyat.info/disassembly_3d_free_downloadoybni.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/OnVHxii/zifapujalemules.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_600a1154f287e.pdfIn PDF document text
    • http://trend-sales.fun/linear_gd00z-4_z-wave_garage_door_opener_remote_controlleri2qh0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412761/normal_6000cbb175893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481056/normal_5fdbaeaf81c5e.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/cqs1gi7/ski_barn_shrewsbury_nj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_5ff191c8dd93e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_6031f8a8d3a14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekurenu.rf.gd/98308889648.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE3 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000d626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD626 5344 bytes
SHA-256: cfcd31cd2276e005f9ebf0dbd2e748403bfcee1b4f6a5035d067abc4706f5792
font_02_sfnt_off0000e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 11116 bytes
SHA-256: 32618dcd2a8f5c63fffb23602ee78182738081d394622959bcd20305791f62a9

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