Malicious PDF — malware analysis report

Static analysis result for SHA-256 725048e0ea69168d…

MALICIOUS

PDF

97.6 KB Created: 2021-06-26 11:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 900b15eea58df52e90fbc9bc9edd728c SHA-1: 9b59595fb9e8676d540b942897b8c1fe23051057 SHA-256: 725048e0ea69168d444d3e77477cff9f1565b17b8d6b65c399628a12b8ed4659
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://www.prieteniitehnicii.ro/documente/file/vomej.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c7a2ed71b---moxisawunuzopu.pdf
    • http://ztkammer.at/uploads/file/figagimev.pdf
    • http://aaaexpressheating.com/userfiles/file/nujatikam.pdf
    • https://hansenlight.com/UploadFile/files/xiwuku.pdf
    • https://szabobuszrendeles.hu/files/files/zobamorokidej.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/39701311496.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/59092447363.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160850dec32ec1---95743878382.pdf
    • http://parkhigh65.com/clients/4970/File/boleguzaxosivotu.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160980c4f0af99---5235337325.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080362494219---84118042740.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/53rrpanbktf8euiipghikh14p3/92622602503.pdf
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/zevoxemuwo.pdf
    • http://litho-and-co.fr/ckeditor/upload/files/pamefodu.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bd2tg2qft9o1gbj3tfs6r2quk1/tadebusejabevudebajusezam.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b55ac03f79a---lozupabeketusome.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ec3ca44a9ebcc388af8f391e199c3612/3426395748.pdf
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/vozamalawape.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abf54a9f132---tafeg.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a604f61d32c---76813802243.pdf
    • http://allasclub.com/campannas/file/gitugezifuxa.pdf
    • http://vom-ragnaroek.de/uploads/file/70152649907.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=detecting+lies+and+deceit+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110D7 16792 bytes
font_01_sfnt_off000128e9.bin
5c0fdb3c768725ad1f9891439420f2b4e24385328832d975f5c916b0b87e933d
pdf-font-stream PDF embedded font (sfnt) at offset 0x128E9 17764 bytes
font_02_sfnt_off0001579c.bin
d1b648b94fdad46668831f43628bb333b4f1b70117194da89d27530951692f1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1579C 10576 bytes
font_03_sfnt_off00016fa6.bin
fa07b8e1a54ce7af3ab9c8ef7f230cd9a8c82ed594f03b2730bc73f3738ecc7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x16FA6 2056 bytes