Malicious PDF — malware analysis report

Static analysis result for SHA-256 792da8031be5d6a8…

MALICIOUS

PDF

89.7 KB Created: 2021-07-06 08:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 151df5b1501c49fbfa9ab6d4948d2ec3 SHA-1: a11f1942ca910f08804738c2be3163927714bf42 SHA-256: 792da8031be5d6a84a1f9319e4ee4dddc09f5b1db59a1cb4cc4bfe64a4082f7e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports the intent to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=pmay+application+form PDF link annotation
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/q5frp44jh8h4lcv748gu7op8d6/garajanelerazepesiji.pdfIn PDF document text
    • http://goneviaggi.com/themes/userfiles//files/38717748997.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4db596c716---wameganomoluvidifipef.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/xaxufodowu.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/bf87a53d23d9318414911ae8a749296d/69189104214.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/afa243e678756a4792a9a9ba391c6e38/73291971330.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89e18d1196---maxavepofogaxinarakozi.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e3b60d5f9ce274de8925164308e33e3/dibabamedodolexokegolu.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/01343b3393581eeea21f22086d8ce446/47722379054.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/wemudopimolekobojojatur.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/rixozog.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/48403883247.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cca549c90---rozilomavekineg.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbafc93f745---patewix.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/p191toa2hra0h5nf7j4hth3uqk/tinelusakeluzu.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9932e5bad---57926624986.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/19925649241.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48cdf67c22---87179115850.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/4756016487.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/vafisemaworonimejokipefo.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/56669738224.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/60812056641.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/vimufaloliwepiloz.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_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 17772 bytes
SHA-256: eb5afbf4f5c3abb2cd07e71eaf443ef8bdd98e41cd48c21fc8b1a514737a93bf
font_01_sfnt_off00012a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14217 10456 bytes
SHA-256: dc4f467161a71eb1741be99fea821543be36153bd989382e026b61611127bf6f