Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa0d3487c64f0d3…

MALICIOUS

PDF

83.0 KB Created: 2021-08-18 21:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd020788591be3f2cbd0d82f811f99c8 SHA-1: bde91663d59b12d94a3a72a38b19fa9d9aaa907f SHA-256: afa0d3487c64f0d31eea181db3531647b6f4a4b9c5a5c28f5c0ad079ce386722
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/nlqooba0clm3ifc99tg04b5j40/lozagev.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/92208079681.pdf
    • http://cornucopiafrederick.com/uploads/files/xosubedunajamakalo.pdf
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/87325798096.pdf
    • http://ejmk.com/ej/upload/files/gijalawodezev.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a17622b1a---juxekalebetigaladod.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113d79e03e98---29193298249.pdf
    • https://champion-osk.pl/userfiles/file/39023937295.pdf
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/genosasajerexo.pdf
    • http://sinhorelli.com/userfiles/file/46930793878.pdf
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/marobalebepawikozigabo.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/988736943.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/ij7tk5p3kno6edm6vto7ro32a2/dabeg.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/jgih2du19745ilt81644orhnop/51435496177.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/s0q1rli67rg152bk4h943n50r7/53924605980.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c20a46ad16---41142475156.pdf
    • https://simplehome.ro/ckfinder/userfiles/files/41057849218.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/pipujuxuzotixubuxed.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb7a7ca0ee---zawoxofusejuxituwewew.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/739e787273a560051893938351b1c84e/pufadafafovuxeteki.pdf
    • https://verticala.ro/images/userfiles/kepaxegodalerutilifokek.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/go1qjspdn61k77aak8ka9sv78g/75241769157.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/51hbk2vouvggksrikff60krjqe/sabimusivopisogal.pdf
    • http://www.pattyn360.com/upload/forum/files/95927036335.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+do+i+reset+a+maytag+bravos+washing+machine
    • 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_off0000e05d.bin
d4af66e0c1a0bb1b13febb38807d8b20062ec5b1ad602d4c16021fe64db994d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE05D 11168 bytes
font_01_sfnt_off0000fa2a.bin
53439576184c2a8d37b09c7c9956fa53ca07fa506683a2f9348cfbcfdd6697d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 16748 bytes
font_02_sfnt_off000125e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125E2 16792 bytes