Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba2db99ed294a2d…

MALICIOUS

PDF

105.3 KB Created: 2021-07-08 01:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01a6757826aa351f2d15bebb622c546d SHA-1: 8911d6a521f420d97b49984973045466f8e98bbf SHA-256: bba2db99ed294a2d93d76d1108ac1c548cbf451275f68960053b421e3c38d889
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites, identified by heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URLs suggest the document's purpose is to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/5415fcc833717d1572656bbc52065260/53466559423.pdf
    • http://reclameindex.nl/images/uploads/33606317861.pdf
    • http://vorne-sitzen.eu/pcms/content/file/bozovezifajotane.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/71624615796.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/cebaca05eeb2fc9de15029792e70cb4d/45422533886.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a045b6044d2---25881658537.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/668b59015c905ddcf0f35082c1dac478/79110233040.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bc9b4a7b799---rerirafibo.pdf
    • http://happyhanool.com/ckupload/files/losaxubibonejemaj.pdf
    • https://cooperspick.com/files/morugekanijoj.pdf
    • http://amesonsofallen.org/clients/53156/File/32502580790.pdf
    • http://armanetti.com/images/pugozavazefunaw.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094af8924f0d---95887535086.pdf
    • http://gtlmarinefuel.com/userfiles/file/zenigekenegilovipopav.pdf
    • https://jiu-hang.com/upfiles/editor/files/rivabibibagavibezise.pdf
    • http://terralindahigh1981.com/clients/866868/File/tipalefenureja.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/5fc220298bff8aafa779f9fe10eb895d/perinu.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745cec320fe---wefefe.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/li4t0oqpnr071gnfmum0d0vnk5/fizazeteritosoxetefer.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607642d9a7f34---80152186281.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/53456eb569281c9e1e02326c714d69d6/madazukixawu.pdf
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/jorulumomumu.pdf
    • http://viettelhaiphong.me/data/dulieu/files/kogugodukijelujaxarijozo.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/mf84b66ub9lg3f8rutofcvofhu/wetoberizavuselawik.pdf
    • https://fcksa.com/ckfinder/userfiles/files/ruvajuwemiburumagasa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=all+binding+of+isaac+characters
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012aef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEF 16792 bytes
font_01_sfnt_off00014301.bin
3e0164eb6e01b5d899a5898be3c3afe8f00d02ed707b8cd93d25fe5730049759
pdf-font-stream PDF embedded font (sfnt) at offset 0x14301 18496 bytes
font_02_sfnt_off000173aa.bin
c32cb98965d1394bbd60e2c82d6a25f4a4ecb4492a5c16807860b83fa509c4aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x173AA 2032 bytes
font_03_sfnt_off00017cf6.bin
a3c58370f10cfb2319e46fbcb036d4c0da922535b61ac3ced74637453ff107cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x17CF6 10876 bytes