Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f0cad8f4ec0c8e…

MALICIOUS

PDF

92.0 KB Created: 2021-04-08 00:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91b6f43c124d4eebf48f0ccc3911d826 SHA-1: 7eb534d4d1e74b154f59b81db079e98ef2303e49 SHA-256: 43f0cad8f4ec0c8e59dfde138e3ff987da4d8a43211ddbd1cefc4886dc49f270
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to vehicle valuation, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=what+is+my+2009+subaru+forester+worth
    • http://pimifawimonidij.mywebcommunity.org/what_does_frankenstein_represent.pdf
    • http://korogesubelokut.mypressonline.com/hipoglucemiantes_orales_en_el_embarazo.pdf
    • https://static.s123-cdn-static.com/uploads/4428061/normal_5fdfcc6da2fd3.pdf
    • https://static.s123-cdn-static.com/uploads/4489977/normal_5fe22cb3d0416.pdf
    • https://cdn-cms.f-static.net/uploads/4470543/normal_6043f2af69a28.pdf
    • http://silujokiz.mypressonline.com/human_behavioural_science.pdf
    • https://static.s123-cdn-static.com/uploads/4490934/normal_5fc65ccb2fb4b.pdf
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5fe771519b128.pdf
    • https://cdn-cms.f-static.net/uploads/4378393/normal_602498b2d23e4.pdf
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5fcc7689be5fd.pdf
    • http://baditunabupiru.mywebcommunity.org/gamorezuginaba.pdf
    • https://cdn-cms.f-static.net/uploads/4475728/normal_606c30b863f75.pdf
    • http://nesebonuvobeju.getenjoyment.net/the_killing_pact_2017.pdf
    • http://xakidofe.sportsontheweb.net/91844499454.pdf
    • https://cdn-cms.f-static.net/uploads/4459792/normal_602ab52e5a336.pdf
    • http://xufelaketodo.getenjoyment.net/usps_domestic_mail_calculator.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kavalukato/79293199439.pdf
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_b295614c01d74bc4b83fbbee18c0ce74.pdf?index=true
    • https://s3.amazonaws.com/lixuduwonifa/descargar_firmware_para_router_d_link_dir_615_x1.pdf
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_8a7f6167bb984f0fb349bdb48e2ede03.pdf?index=true
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_66197cd454bd478b9d5efc60017d36ec.pdf?index=true
    • https://bae73f5a-7881-4275-ad8d-fa096fb8bca6.filesusr.com/ugd/8b97dd_60395baed6964e0eb9ef63785deb956e.pdf?index=true
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_d4511ab414e24b349c88a320aaa697d0.pdf?index=true
    • http://majezomisi.myartsonline.com/77040484149.pdf
    • https://s3.amazonaws.com/jebokizez/vijoxevazifewez.pdf
    • https://s3.amazonaws.com/woxotopapozokev/go_to_market_strategy_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a7e.bin
d20bc6e441721e95aff7a9c2edcc9bfaff6568cae7089818d95baefa22bc3ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7E 5528 bytes
font_01_sfnt_off00012d60.bin
96cdfcab8f86df7188dcf3e348e044ed5fe450c77d22d72598e30ac7782240ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D60 11116 bytes
font_02_sfnt_off00015383.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15383 4324 bytes

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