Malicious PDF — malware analysis report

Static analysis result for SHA-256 1709dbd14ebe2d9f…

MALICIOUS

PDF

91.5 KB Created: 2021-07-07 21:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 05406db1a67278ea32399a0aeacb423d SHA-1: 45b60e689e48667b7ada0632aaebb9085514bf71 SHA-256: 1709dbd14ebe2d9f195037dfa41beabd8de4f2cff95163dd2febc457069f7626
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristics indicate a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b3cc7a76caa11fce1bcbef43f13fcbff/banosoxawinatebujorob.pdf In PDF document text
    • http://join-angel.com/ckfinder/userfiles/files/68956363028.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/86610780748.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/40147106983.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/a41a9f0c02e6ac6a343b3fadf48ddc28/mivalabilosakavexemabu.pdfIn PDF document text
    • https://fallsplat.se/file/kugusurog.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/zavukomekareregepatamijej.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/15127860591.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/6lf1ui63afr885rp198ibe5trt/49688231950.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bad92bf2836---vorobosux.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/xavutiwiwumijuzozonujeg.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8c7faa33abf54584c1bfdf7d1e43f7ed/73375055681.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/95b6cdc4233174cce931572d6c1f7be9/90048897784.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/5631424649.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075867c2ca65---sowogemenigo.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/12457447637.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/e0f4fd3131566a8e96dedcb271f71a4c/42498717448.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37167a2899---36766094728.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/filofuxetilixo.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993f739d2bc---11230730707.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/7d9470881f60315cfbef8e78b9e3048c/boruxuregesemosaxi.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3ac723c56---30585351399.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16092f1ea494c2---52330982455.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/40452772592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=lp+hartley+the+past+is+a+foreign+countryPDF 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_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 19948 bytes
SHA-256: 01c90e739c5ea05198f5442c0d2f70d3be223fdda8d1f4810b27be492f132a4d
font_01_sfnt_off00012f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F28 10928 bytes
SHA-256: fc9ea61f3c2a6d21ac1d5969ea275a97d6c51e2522fc6f49f8364fdea80e0322
font_02_sfnt_off0001487e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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