Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68970cd597183a8…

MALICIOUS

PDF

72.9 KB Created: 2021-06-19 06:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 670490053bf6e5e84d78dbeabd832654 SHA-1: 72b1a262390c287b9eae56c2f62966342adeb535 SHA-256: b68970cd597183a87f019cdc5ee0602fb628fd74bf16cffddb124cfe2299c989
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs that point to various websites, many of which appear to be compromised CMS uploads. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.peretprod.ro/content-images/file/41712574684.pdf In PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/cg5054an58mvs4pg8hfjb9ome2/pigizodomotakoxepadorij.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/p48o8m1i1rtl3eq64n68o2l9d6/42583970626.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/vabibekizezomo.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/demukupuzakigarejuraso.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0263b4f8---13787767650.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/42095bf26287bcadbccdea62c9bf89a5/xunesopi.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/masafosolotakonobud.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a12748b6986---ritalod.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eefc5762b---vuzimubasakofiwinulipazez.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/4717932526.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/muzofizexumaferoveduj.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/r3u68kpa80bb1nsbcftbuvj79k/vozomepewozelirifibosozix.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/36702881009.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/0sbjp1gu0smkue3aci45tc5tdp/vuvimaze.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/569fba72f2cfb92a73ea558930977850/73210823811.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/45362711245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=gcam+mi+5xPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF9 4860 bytes
SHA-256: 4023e808ce55d5e8dbedb10cf87696c50aa24d1fed31b8f724495629cab1e10c
font_01_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 11692 bytes
SHA-256: d1458ab82884136d3c70a0bf15887dcc8eadb5ac9168895472bfa987f28b837f