Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2e0f974b08212f…

MALICIOUS

PDF

77.3 KB Created: 2021-08-06 23:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 60f280532f4b9a94e9c6ee8716ac930b SHA-1: 67de431a66cffcb3554abbdd26a4cd26d3710c2d SHA-256: dd2e0f974b08212f38f2cfe19d5a2707982d8100f45d1f0aecb5f6de9c6e9019
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous PDF files hosted on compromised WordPress sites, suggesting a phishing or credential harvesting campaign. The presence of these links indicates an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/04a9a37eef49f811852e7aef7c061d36/81042183140.pdf In PDF document text
    • http://cancercareresearch.com/userfiles/file/69111713186.pdfIn PDF document text
    • http://tfforming.ru/d/files/12580843810.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/80553704409.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/6vntblje35doidn7hbludgpjg3/puwoxovele.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/59680247947.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/p3n9r5uk3muv1am17bd9ova62k/gemeriwetegit.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/12156371235.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/5261712412.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/jujemavubogodot.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160990bd0db5a3---zivojepejux.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/viperijuwetozifo.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/fd388ec9fe5545d4e0721a489702367b/71508068869.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/99966615366.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/3918a7e9b4a48ecdc4dbb22878c86889/dejoxuxukederebire.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/32613328087.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/db189ec44ad7076188e15295a07e4efa/lilamodidufapemeruredod.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/07/files/210701211011.pdfIn PDF document text
    • http://flirdining.com/uploads/files/xatotutigadusezenivi.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f678ce0e4f---21056791594.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/0346f4687fec98aaac9fde6d12581450/13553345701.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c676b763a42---47048465550.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbc211f5ba---nijida.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/47325500225.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/8d63c4013f5750bb51df684796d9f0f9/31086393563.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/26771952161.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/divenutikoloruweliligijak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+program+a+autopage+remotePDF 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_off0000cead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAD 15612 bytes
SHA-256: 95785581bd82e16359b7dde4d881e63814df5186eef51ac8e92a7a8706119877
font_01_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 10360 bytes
SHA-256: a6b2ce33473ea0e1ae87d6b0bc1353d35dc619485d7db229c83ac52adf6737e9
font_02_sfnt_off00010e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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