Malicious PDF — malware analysis report

Static analysis result for SHA-256 9470febb8ec4f9ee…

MALICIOUS

PDF

77.3 KB Created: 2021-09-08 09:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b225809804bfe8a0addbdc5fa5869e7c SHA-1: b58e305a2c29c21e25a2166d3195a33ea4a4bba1 SHA-256: 9470febb8ec4f9ee38a9634e63e8c3f8790ea276feee8cc5ff046d652aa6a3fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting sites. These links likely serve as a lure to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://pixomot.ru/uplcv?utm_term=carbonated+beverages+manufacturing+process+pdf PDF link annotation
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1417b8fe11b71a54bb5b5d628bf7ba84/kidiganakapazajib.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/af63a910fe6ce9faf17bab2c26145b14/19639460299.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/luwiwa.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/72334416675.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/51vvjq0o7v08l13ua0q0o4mmmv/8527058521.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210527200132.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/nadovetigisebale.pdfIn PDF document text
    • http://klhl.com/userfiles/file/sokonebiwibesobaxorad.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13ae86313---59989712875.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/22822643621.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/vegolifedomenide.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/tafuwaliwem.pdfIn PDF document text
    • http://epmachine.ru/d/files/15532487234.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/37032635839.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e595e3acce0---40697667366.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ub5pao5q72b6dtj5r1ofgneoap/75950353170.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/magujamal.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/638503555.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a449d2b92bd---motixowesazefivipaxukala.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/67425843055.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/867374107.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/pafikigosedubonuve.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/zimuropazobitodesipaf.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/fibitoxaxiworosomefuw.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://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_off0000c70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 11256 bytes
SHA-256: d367e86c8d6e855dfc3f7a1fbcdcd5565c2c72ea2aec13efe741bdc1317e303f
font_02_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 18120 bytes
SHA-256: 62bef807666e4c24a87e3dede938df4403752007305a9e951edc86108568593f

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