Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6a00c44f7a91ab…

MALICIOUS

PDF

81.2 KB Created: 2021-09-21 03:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bc5bdaf59176fef1d9d80934172a7d7b SHA-1: bceb7ec6cae7ca304c0cc76f0b290596a12e63e6 SHA-256: 7e6a00c44f7a91ab3100dbc13f527f8c1c03d5e7bd38eedd44460e513ce86a8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous external URLs, several of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the presence of numerous external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://superpackeg.com/userfiles/file/32325978362.pdf In PDF document text
    • https://honghow.com/ckfinder/userfiles/files/48583021737.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/52993539844.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/94516983185.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a4541d7c149558750164c756743edd36/tabeloj.pdfIn PDF document text
    • http://sireny.net/share/files/8931006536.pdfIn PDF document text
    • http://hortherbpublisher.com/files/upfiles/file/5480580217.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/161360b2d17f93---31507445266.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/24586597809.pdfIn PDF document text
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/7864923333.pdfIn PDF document text
    • https://cubic.is/userfiles/file/kukutiwe.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/161422967d33aa---788537224.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/66347731105.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/rasexosik.pdfIn PDF document text
    • http://rsentco.com/upload/file/42672482293.pdfIn PDF document text
    • https://irrisyst.eu/files/file/74995840659.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/75917472213.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/44268054452.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/wogufupupubajujagofi.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142538650590---patudalinigut.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/84482057094.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/52326748859.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/kojusegebonezovinunad.pdfIn PDF document text
    • https://mbp.hastatis.com/mbp/upload/images/images/upload/ckfinder/vaduwigigudagotifuz.pdfIn PDF document text
    • http://ekouklid.eu/UserFiles/file/11536951432.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=tolkien+letters+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_off0000d8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 10384 bytes
SHA-256: db6514c6eebf7d1f11f619070ba798d3abefc1bc6acf8f5986d77dbfd586672a
font_02_sfnt_off000108a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A9 18128 bytes
SHA-256: 6cf4047eb7d948c531bba209bd8d30a03e65e191a564991964f021cc18e47b05