Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d94f168a76f472…

MALICIOUS

PDF

86.5 KB Created: 2021-08-04 04:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 21e8c37f6f8b15012d4f9b169d519f53 SHA-1: 1854b9baa6f420378227bcf67918c06c489c4dba SHA-256: 64d94f168a76f4726b5b6c0c244f631efcd61386d5828c82773ecbc15bc64f88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/4c2ab1e0dd855927e99ccfe331c17c34/jusajubasivipumujado.pdf In PDF document text
    • https://superpart.com/files/sumoxareneraponupimukit.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/59057606900.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610315870a85c---wopafosa.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/nazovinopu.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/73124799406.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/zosokezotira.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076421bbacbe---totajuberozu.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/70581029507.pdfIn PDF document text
    • http://cachnhietwin.com/luutru/files/62015598826.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/2277cde6594606c0e2e023106bb37061/66654069276.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a541c291192---mawoko.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/44139183024.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/vonozimudamuzamotatos.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/buganoda.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085db0f6a511---34638634270.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b0af108c5d6ac14fc77b4241e2c6956e/gukuxaxavifusaxazalidud.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6c4fa87f2---vezawefo.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/72244355185.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3f46c07632693df528c01a1225e17125/sefojojosir.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/merojobebore.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/82294999703.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/a447b00707732dcc81ee04c88238ed09/logokisikijomofepubozaxup.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/46753395148.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/o61rlpdi6da3bdi0lkg9u4kf1l/dodapipiv.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b618ae85a75---65097290696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=is+rainbow+six+siege+one+playerPDF 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_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 16932 bytes
SHA-256: 2a8d4e40fca9bf23dea87c2d2b7a9ab885c935e44d9687d4233a5f9208bb2d07
font_01_sfnt_off00011aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFF 10720 bytes
SHA-256: 1f20169569b8f335bf5a03c0e3a8405b07f6872c6006c3afdb776b87f08417b6
font_02_sfnt_off00013394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13394 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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