Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36ec94ee1680284…

MALICIOUS

PDF

83.4 KB Created: 2021-09-02 19:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1a4c4b030f561a219a0532377b82c393 SHA-1: 15af40d8b7baa74900c3bb53af0f4a4e786349ad SHA-256: f36ec94ee1680284a795d4d750cbe9a016c1b1fee3a5a95a6b5360812df2a718
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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://allytemp.ru/uplcv?utm_term=osprey+farpoint+40+manual PDF link annotation
    • http://batterseataxi.com/survey/userfiles/files/17784302771.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/zaxix.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/38375984261.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/gpm2d3suitm4lif3fjt750vvak/10069178506.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/bb51bd599a770786f5bd64ba9844bfdc/zizobekuwijusurejanoz.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/4884ce3fd75d07fba353ff5b1ddc4884/6060215787.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/c6222096626b92a3877c5c4d3aed48d8/80220635917.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c354e337583---9098543286.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/281902214429.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/wuporanofenirimaz.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/fivopezalewavunuzomijawer.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c3c4d8ea88e658805f8ede8cd7473f89/nubel.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077aae7654da---lafobuwewinesogupezotojo.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/d2d97ffa4e924b9721d7c18c0456c057/fasegilifaguj.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/j3bj6k15d1u23lqi74btp4p971/megimananezalanuluvozow.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/569709569.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/72dfb36dc315a75b145e9ca4f9345270/68196241418.pdfIn PDF document text
    • https://xigmatek.com/upload/files/58984852333.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/30181596678.pdfIn PDF document text
    • https://davaocarrental.com/images/file/54770501024.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eda2bc51e---kanolovanusavax.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c247339e2c8---fabebetakesibugeleminize.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/25992386128.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e1313a1c2a98aac9f31ada1aa95e6f55/31633919830.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_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 18316 bytes
SHA-256: c57985c4a8a4017d5bf513c7eb833b92b927bee138516c0dc818464115753eca
font_02_sfnt_off00012698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12698 10956 bytes
SHA-256: 6378c0321d82a23616720d892b44010f77a1bd23a725522b0648d7316f40c6f8

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