Malicious PDF — malware analysis report

Static analysis result for SHA-256 054bbfdfa286c60a…

MALICIOUS

PDF

86.3 KB Created: 2021-07-03 15:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 464aeae4f1b2d011b03efc44c03ad05c SHA-1: 14dd07694f6f3fa4564abd44a9ad9dc9e1abd4a9 SHA-256: 054bbfdfa286c60aa08cdda451c176fd63050ef6640b1b2a5b42711b04b86704
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains identified as link farms or hosted on potentially compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL distribution suggest a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://kurdumovldpr.ru/uploads/files/zarex.pdf In PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/paranezed.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/97993098317.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/nukimexebe.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/87101496869.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/44557420339.pdfIn PDF document text
    • http://phuongninhphat.com/uploads/userfiles/file/gigipepufamumet.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/tepuvotumawipizom.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d5678e7e56b98287ec9ee7fec00cebcf/41663442683.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/1247207605.pdfIn PDF document text
    • http://secretinvitation.net/images/files/89521924528.pdfIn PDF document text
    • https://petala.gr/userfiles/file/senupe.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/wareruxelomitilexajotej.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/zogojonufosuworok.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/de624bd6e231e3714030ab7c851d96d6/93071300777.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606d020f1addf---26002255113.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/9736588bb3bdec5b7559636704c82875/tajasukinejawik.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608579678c340---warodelusewamom.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/rodijixerirefarida.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7a1201942---gikelafilabesi.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f33eab3ab1---pudalagodurupusozixezedi.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/sa1rbqm11tte9iqs4md7mn42l4/sedidapino.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/8cf37206a250676edfb448512f80d880/68509814937.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/lixejigip.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/de6f64450a1963b6f9770b0edcb44383/bosalirodan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=tomatoes+and+capersPDF 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_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 17552 bytes
SHA-256: 9093ac6e678816d9d68d1ee6d75e52ca49e83be09973faa19188065531d643af
font_01_sfnt_off00011c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5B 10500 bytes
SHA-256: 0d03a61cb84ff237ebdfe4b5ffe04fbbf3c3507143b7fca00cad1ef877180fbb
font_02_sfnt_off00013439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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