Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9d0892c074256b…

MALICIOUS

PDF

83.7 KB Created: 2021-08-13 03:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2b2cc5a0dbb95a4142c8b3176af62c66 SHA-1: 65ea69b2f987e23b31aa5806015f783282875607 SHA-256: bf9d0892c074256bcd8583f5f808f3aa8ecc976c485c568601b8ae632051f760
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drosamahetta.com/userfiles/file/58731700559.pdf In PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705d4c4f828---87038766333.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/1gsgqlsv893ql2g7t2ar69ij51/60072948039.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/45735130586.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/2ld3tktcv2rvrcvhk3m28m4c2o/21708543456.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/99595dedff1fa1435f440f5ed41beec9/38087134073.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e3e62db44---kewozemoxujezosiku.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/somexepojurozi.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/65571016396.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/53233894494.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles//file/suxida.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/laxodurop.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/37993515806.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/94735612031.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/8f4e595692304737ab2e0ccc072995db/ziserabunigegar.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/27466000752.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/jotabozowodugur.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/1e21fb5b75b6f0a99fbd743ac2ac02d8/42264744643.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/gejilu.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/bafinij.pdfIn PDF document text
    • http://ladakhtripmaker.com/userfiles/files/nitoxukedukiwowemepebe.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/pegevonuvebut.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/38673250405.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/07cde222508923eaca9923c292a6f4e5/visadako.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/40898417656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=vocabulario+en+ingles+y+espa%C3%B1ol+con+pronunciacion+pdfPDF 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_off0000de0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 18076 bytes
SHA-256: 37f5920d3cb9a640e6537f840c33a72b99e511aa0afc8179b8a278299aa16d49
font_02_sfnt_off00012468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12468 11228 bytes
SHA-256: 71c0ac85da7b9a0491922f398a297592abd94ae0559efe77c0d28c1f0924adb2

Open this report in the interactive analyzer, or submit your own file for analysis.