Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d14cdbfabce7a19…

MALICIOUS

PDF

77.7 KB Created: 2021-09-16 01:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: afbeaaae080a7e65a82db07c0c14d0a7 SHA-1: e4609a11be2f8249411bf59729aea70b271c42e4 SHA-256: 0d14cdbfabce7a19684be5f58268df1e09589a234afee6d5c981aa312f34340b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable hosting. The primary attack pattern involves directing users to external malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/zosurajevadanenijeva.pdf In PDF document text
    • http://evolution-dev.com/file_media/file_image/file/60478376823.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/1039738040.pdfIn PDF document text
    • http://belniig.by/public/file/fakabujofavapomulijaripol.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/bepef.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/49395753547.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/nunalitirafarak.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-4/20210904145254291219.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/mexijegipugawenejub.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/a960998a42a2afec49632a8e0406b15c/14616524391.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/29963316786.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/wenafajepixux.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/7182701664.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/98607731868.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/2576334613.pdfIn PDF document text
    • https://dacola.com/upload/files/30755714135.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/36500151166.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/11281949359.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/18182409069.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/37559422244.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/da430584482d4e2595256ba0548f6fcd/57282889535.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161327511a82c1---tekixudoxokafavofejor.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/89368464293.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210913/file/96648090432.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/dbbc9c8c51502fec8e398883bd6a14f9/94111377579.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/cb096b3cb3e5c2a5286299aa8cf2d78a/86177589735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=benefits+of+using+interviews+in+qualitative+researchPDF 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_off0000c994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC994 11068 bytes
SHA-256: 08fafad128631a6afe8313a50cc8808a9bb76917ab31f14101cf8d136ca0949d
font_01_sfnt_off0000e31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31B 17560 bytes
SHA-256: db6434d8053ffa0bd8b82c8f826a99b0e6f180710eb3bb54b39fbcf307ded08e
font_02_sfnt_off00011069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1