Malicious PDF — malware analysis report

Static analysis result for SHA-256 010f2cc1dcf68a08…

MALICIOUS

PDF

86.6 KB Created: 2021-09-16 17:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9a21fd12ceddbe4f0b969e735f89c51b SHA-1: 5a91d5b3e662722c66375075e2ac1386aedb0e4e SHA-256: 010f2cc1dcf68a088610d685f4eead736e8c076d3ea8a08fb404b1874f23f3a6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many of which point to suspicious domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • 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 http://mtcongnghiepxanh.com/upload/fckimagesfile/13542128911.pdf In PDF document text
    • http://fratellilongoni.com/userfiles/files/mesijozorulatijon.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/wibijeluko.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fujutepuzalowupugikuteg.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/zotezibibu.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/56386305878.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/wubuvuxakumidiri.pdfIn PDF document text
    • http://chayka-svg.ru/files/424195078.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/33291897748.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/38963689205.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/rafebutejapibovode.pdfIn PDF document text
    • http://gr-chem.com/upload/files/79026300158.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/2628747347.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/23530368267.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/12dfee333284a88f569aa69699a23899/28577730383.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021091415223760.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/tuwipoluwirosesapinexajan.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16131b8526dafb---sebitunaliwepase.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/pogifiloruzusexikajofina.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/kuwagagoxo.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/xevewotetupofim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=movie+dont+breathPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 18824 bytes
SHA-256: 7a6ae43ab0c310ee3444a834521c8b60224de201c51955279438874af4db1ff8
font_01_sfnt_off00011d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13586 10332 bytes
SHA-256: a4dadf406ccaa9136319159f7993e098ae4ce0e5a2988cb665993fd8126d2145

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