Malicious PDF — malware analysis report

Static analysis result for SHA-256 d492a2d8fc6ec559…

MALICIOUS

PDF

82.4 KB Created: 2021-09-01 03:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d8bf35c568541eb8e7b59a65b82f05f5 SHA-1: 539013bea764bbac495e5d63fdc5aa0e52748aae SHA-256: d492a2d8fc6ec559c6e37b34a0de454ea0ea15e95def0fa519b165c226c862ba
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. Heuristics indicate this is a link farm on disposable hosting, designed to redirect users to other malicious PDFs. ClamAV and ML classifiers confirm the malicious nature of the PDF, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2472850428367724ef279c7532ce260/revakipizimidamebaluve.pdf In PDF document text
    • https://baptistfriends.org/media/92794602160.pdfIn PDF document text
    • http://knipia.com/userfiles/file/95567671687.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/rirotamimojudavasewer.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/bewawuwebabudaweji.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/a1ed39fcc1792cc96cc86303a116ac5d/gedidaxop.pdfIn PDF document text
    • http://osayit.com/images/file/40739843453.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af44294222d---55333092106.pdfIn PDF document text
    • https://saam.vn/images/content/file/joferazi.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/loxolupidaz.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129879f571cb---wameben.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/jupetadifilavomavusa.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/4n7anpqprse1ceg56e1754olme/82928479678.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/mujagezuzagorabutarevubit.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xomag.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c011b5cd080---gilase.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/61894923202.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/sibiboxagin.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/mep1g8j282fifov3320i723551/jafuluwotiwazezolumebezu.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/jodotiwibobewejodin.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/61883943660.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/25142131814.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/jaxaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=indo+chinese+cuisinePDF 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_off0000e150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE150 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 10112 bytes
SHA-256: 4e40ea1cea6706fd9917daa3cfae4f58f5c0657dbd961b34835bcbf94c53d73e
font_02_sfnt_off00010fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD7 17184 bytes
SHA-256: c67bdc4838f25828d136369055bff3058d5e0081db1d7a2eada0780a4f32699c

Open this report in the interactive analyzer, or submit your own file for analysis.