Malicious PDF — malware analysis report

Static analysis result for SHA-256 172096df75445b1a…

MALICIOUS

PDF

107.5 KB Created: 2021-07-02 01:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-07-13
MD5: 34fecdf646b5d1c110293f6375c32fac SHA-1: 4e0e9761eba9123a9a2558f5caece62349477982 SHA-256: 172096df75445b1a54d766f5b589e18c8ac85b66a0c7546158e51f084c1688f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://laborke.ru/uplcv?utm_term=force+is+a+vector+quantity+or+scalar+quantity PDF link annotation
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/3fdb77c700911c865edc65fc12b23943/penupinujaxisazubiler.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/18417319738.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/042de32a704179ab50a1d07beb3eec24/52762280645.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/0bd3c962155c043d5d21e65cfc93818c/vivujorufetave.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/jupobiwopasevub.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/vuforuxudagufuv.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160842773aaad5---53481092735.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/c3v0o3441qe9ptn3iimj4piks1/dogekotujizekonu.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ef19a32b---fasusipojukomuxunan.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e5810dd3c---milorolad.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/0e6c051ff03b595c6757bf3ba875f86c/94819397228.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/5dbe25790b33d1b6013190e370c49acd/padakapuweroko.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/5424233415.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/b2502f68a5f8c029fe60443702ff374f/85094129617.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/95396290278.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/u5o8obkp86t9m4b6oft80mhvr9/33177503786.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/54494747900.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/zututanuvakut.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/16774934848.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ef14bf7e0537ffa37282755a7214cc04/64347948687.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/45f23e8b8998eae5bf7f6b7fabe05905/90620626705.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/64e4c57c92b95eaba2448b6d8d664127/18009734734.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d624d9d8c6---648422140.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b372669de6---93407076273.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_off000141c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C7 17448 bytes
SHA-256: e76da6ce0a96dce5bdf73dec15d6aba17e2140e22aa511e1ab881b9c3c4fb8b6
font_01_sfnt_off00016fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000187c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187C2 10624 bytes
SHA-256: 909f7f34c71a097d90bb467c35add7b52fff832e28fc946269e3858a0577f603

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