Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07e2d7e869011d1…

MALICIOUS

PDF

69.8 KB Created: 2021-09-28 06:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4901f730fdf2ee2e938c3640c0b1790c SHA-1: 2dd1cb22c8c16e159d52e5170bbccae76fbbd2ed SHA-256: d07e2d7e869011d1b50832455938d25c640f7d2ffeb014082424f1765dacbb11
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=gordon+ramsay+lamb+shepherd%27s+pie PDF link annotation
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/gebijurupisifotos.pdfIn PDF document text
    • https://kildevangen.dk/files/74429527778.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/xibezug.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331e166b6dd---jatujebasilifudux.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/13044387056.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/57204890459.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/34985622503.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/19469439359.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/20089854832.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/kiwilatareros.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/51925918915.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55982772967.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/22816957267de3338c38abf3eadf7775/25539741060.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/ximeb.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/safufibuwudagifipadaw.pdfIn PDF document text
    • https://badrivishal.com/media/22379218895.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/3736edbdc517c5573138b956a2582b3b/vumebazono.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d0a72138e---9184520961.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614dac1a59113---xejozediril.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/notexiwujoxavavesof.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/jinamitusi.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/mexipeta.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/80474713757.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_off0000b029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB029 16052 bytes
SHA-256: e4ee57493b481a1de6b55b3a3442f7596f69b9d748e55ea1594a84a80807ecd7
font_01_sfnt_off0000d8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 10888 bytes
SHA-256: 285849fc2de948a3de9aef2b5c3b4d1388c9d81d6601701a2bd13a3425d5b438