Malicious PDF — malware analysis report

Static analysis result for SHA-256 64592e0df60029e4…

MALICIOUS

PDF

72.0 KB Created: 2021-09-04 15:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3daa417a97b4ee2d3c082932c2f84dc4 SHA-1: 4a0ee4d8d87773b079fe3fe2fb396baf3a441d7c SHA-256: 64592e0df60029e477ac7ebe1d8bdd585452cd6bc2e5014fd4776fb692bf8752
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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=icp+ms+pdf PDF link annotation
    • https://ncsccalgary.com/userfiles/files/sulesujozigojalobozogu.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/72978293181.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba785ba29c---gapazux.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/pazobefujuporit.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/66090245690.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/56607ea36fab818f11e9a8e372d94bfe/35647597860.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/29688227403.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/kufafelomiwupupabetaru.pdfIn PDF document text
    • https://rajaunited.com/contents//files/surufixanejawovojofopek.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/bevenogewegukepawobasiva.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa13fd5fe7e---26743367771.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b9eb70884---6498366666.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/berebupenilozekupitetago.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086c04a84a70---suwupilavapujufatak.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/16970528306.pdfIn PDF document text
    • http://tipiland.net/upload/file/zugazax.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e4c1d8976---2666274994.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f9277fa3---zevaritogu.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/pinizawado.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608612c6053a5---24730168451.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/vunigutugejegasejop.pdfIn PDF document text
    • http://transfertrolley.cn/d/files/3660059920.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/gesusaxisazizajalekem.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/f58c14f5e1fcfae055a2425100b2fc76/rulorunofax.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/82554407318.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3a19874b0b3f4218eef13c48b48f1d71/wasega.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_off0000bb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38F 16196 bytes
SHA-256: 8e5523e6c2db2ce1620fe175cb6e04c1786453799fe1c7a99786bfaa41d10450
font_02_sfnt_off0000fcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFC 9876 bytes
SHA-256: 62ead5d986aa4767ada343df68b36a722eb9b80a9bce4dc471009d34448eb6f7

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