Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d07ed709de9add…

MALICIOUS

PDF

69.8 KB Created: 2021-09-27 23:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e7660e090105feee1c2d0f1cd0f0fef7 SHA-1: a70b99433d214b806f909acf00fcfe04ac33b008 SHA-256: 64d07ed709de9adde29b696189aa64754bf6086bac30d8298a7888570bd8eee8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allytemp.ru/uplcv?utm_term=muscle+names+diagram PDF link annotation
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614adbccc075d---58544282899.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373c9210fad---27270772938.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/28082875899.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/nojelajebu.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/xagulezuvasezuga.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/fuselive.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/lutusevebipaf.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161364222710bf---19730149081.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/e3vjphu1lk4cgditcfh130pc6n/10306921816.pdfIn PDF document text
    • http://imaginove.eu/data/Files/19574003601.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/14435588861.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1614858baa0520---dapigamim.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1bd78cc93---67829946636.pdfIn PDF document text
    • https://luminex.pl/upload/file/93387666236.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/fb67e5da8a9d03e72f2bb49666d1fda8/34451911614.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/pojuku.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/beguxupetazupotaruve.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/64ed14e1d30c8a8c04be7f4930f31b2f/71465038703.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/jipamedaw.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f88a61e6c4---gisedovozurumemiv.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/75236112119.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/47930996885.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/linawotinevosafofitaxurik.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fa37ee6b3f---vugefiruxebogox.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/sofumidinan.pdfIn PDF document text
    • 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_off0000b556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD68 14536 bytes
SHA-256: fb14460d8cff90ec0b8a2b4099d5c312d6ab030d3f8e0305b96915f982e5d278
font_02_sfnt_off0000f1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B1 10588 bytes
SHA-256: a8082c35325887595e722ec1cba6937a8f398cc9d5511c6828c32a2d6e17d0fa