Malicious PDF — malware analysis report

Static analysis result for SHA-256 6567c7de902b8ba2…

MALICIOUS

PDF

84.6 KB Created: 2021-09-12 22:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 492fdf75460bd424865c913fb2fe5df6 SHA-1: 21f995a580d0dba3654a6aa7bfb8948e9f4f001a SHA-256: 6567c7de902b8ba26a20dc8c2d7d30fa249574e2c1e14f2b5e67e85388d428bd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains an embedded JavaScript stream and a large number of external URIs, many pointing to compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The primary attack vector appears to be a link farm designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=wrong+turn+2021+full+movie PDF link annotation
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b12c3e49bb---89710209818.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f9b224cb0---42643640937.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/a413c58c47806dec631119174ffeccc0/75812271694.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/1400090386.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/zubabotodabozivada.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac43bed652---nidujemax.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/wigim.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/98748280580.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/vaxogusetonami.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/pavib.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16134c4a972961---mifogusok.pdfIn PDF document text
    • http://furniture83.com/upload/files/xumujawene.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/56209468883.pdfIn PDF document text
    • https://rinducm1.com/contents/files/88289737643.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/tetubosotifiweluzixazi.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/nonotuwaxikufulidirupuju.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/sazonesixofasolaxigojipit.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368d8c06ec1---24307164050.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/80514704730.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/kijigepupoli.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/43485828110.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/37856947332.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_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 10680 bytes
SHA-256: 92565dea09bfe51ab567fa492fe0896235756dd055b7ec7363de70f7ec2b001b
font_01_sfnt_off0000fdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 18244 bytes
SHA-256: 856c0bd617be5089d42d36b4883910a476b7f8c3f711deae0253c0fc3f5e34a1
font_02_sfnt_off00012cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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