Malicious PDF — malware analysis report

Static analysis result for SHA-256 094bea17a3c4838e…

MALICIOUS

PDF

81.7 KB Created: 2021-07-31 14:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de8bf0d9fc3e93e662e6ebf33bd8a4bd SHA-1: f513fb0347ae4f01a21cd5a99fd06199456f1337 SHA-256: 094bea17a3c4838e6ac4cb9480bfecf9d6e3a1eef3ba95efd470b51f47396ab9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various websites, some hosted on compromised WordPress installations and disposable domains. The embedded URLs suggest an attempt to lure users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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 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://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/80c0197c0f39d0d224b861b8b4ff0d59/6594612087.pdf In PDF document text
    • http://norilskgu.ru/userfiles/file/12942541853.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/famepo.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5900d5db2---wojilo.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf4aa011a3---98168204410.pdfIn PDF document text
    • https://ebooksweb.net/files/file/watupodemogifotet.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/larini.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/75201726942.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/52a5b7ad563e4cae75db56434b621606/bevemamilebojezut.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/pasusigibipe.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ad00635f7---zonemabitokimizanovuvube.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/kafobonog.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/b606522c5c8c0ac88d91a5ee21beaa06/boxulep.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/781296572.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb418c7784---pezekajoziwad.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c69c47d74b0813e4ea3463d4452bc347/59550862973.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/fazesa.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/92gfg4m8rer8nnmj4p8o66hkup/57057705915.pdfIn PDF document text
    • https://datawire.gr/files/files/77915107476.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/27110863095.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/pevogunop.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/20056700704.pdfIn PDF document text
    • http://kcobafl.org/ckfinder/userfiles/files/65449962018.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/navosidajifamajavatubis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+write+a+letter+to+accept+voluntary+redundancyPDF 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_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 10696 bytes
SHA-256: 2fff817adb43e769120cf0795cb161d1ebdcc680c858661143c88fcf1afba240
font_01_sfnt_off0000f511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF511 16668 bytes
SHA-256: 33a0943fa7739c4eaa10ecab21c36e14cd6c127adbc8eb98e9c5f261b3be79c0
font_02_sfnt_off0001207b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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