Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6d09bef078abb9…

MALICIOUS

PDF

87.8 KB Created: 2021-07-03 04:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb1277815bad5eabf7ae73dc3d271c48 SHA-1: 809480212ee659d194942765e38595c71928896c SHA-256: 9c6d09bef078abb97a697c21949448ba69ef4dea8440d6befc3f538788eb9238
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and potentially disposable domains. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c296dcb4902---kabajureje.pdf
    • http://bomtvplus.com/data/board/file/20210513225528.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989a87e4b47---10547065990.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0584628a4---dikafebogupesosunefibi.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/11511378323.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609de49862372---wuxel.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/30944777019.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/065cb959855d42efdfe5f8246c5a2e09/gapuvokujofopogavave.pdf
    • https://topclassgreenery.nl/images/file/40805354516.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/08e7aea5078db96beb4165ad3a626186/sasotugobewewiz.pdf
    • http://vitalenzyme.com/uploads/fckupload/file/patowomolupobek.pdf
    • http://gorisum.net/fckeditor/upload_file/file/54018335729.pdf
    • http://clinicaveterinariabilancino.it/userfiles/files/94175887042.pdf
    • http://botosani.ro/img/uploads/file/47050972592.pdf
    • https://latework.cz/soubory/94528732007.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/fja11gcp17ruv71l18stebdrm0/46798881890.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/10aff56f3b068ff4a5f83b1caecdbc5e/85610343174.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a084728c188---vugefalamagesinisen.pdf
    • https://aspirans.com/files/file/47318082283.pdf
    • http://cn-daomeng.com/upload/userfiles/files/7600cea5ac762e8cd4e1211e474379c7.pdf
    • https://htchninc.com/d/files/fipipesek.pdf
    • http://mikailang.net/userfiles/file/20210504085256_1478819199.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16070864503052---wudugazoguvu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=sonnet+poem+about+family
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f43d.bin
c1fbe02dc1027006013c57f5a5c3ef83cd37ea45f9c1c1d90cd10b6841064c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 17340 bytes
font_01_sfnt_off000121c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121C3 16792 bytes
font_02_sfnt_off000139da.bin
d091a0f0692fae9eacda2fc1a9cc7b1bc552ebaa1211c37ca78e518a02d6d07a
pdf-font-stream PDF embedded font (sfnt) at offset 0x139DA 10680 bytes