Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6258c04fd05014f…

MALICIOUS

PDF

86.2 KB Created: 2021-06-29 00:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96edeee428d6a4a3512b00ebf8d3456d SHA-1: fec92e9f150213d42e78106071efeeaa6d38610c SHA-256: d6258c04fd05014f114cee51fc45cd09fe11e39bdb13c34bfc9797aac8468701
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d24765e90---63602889629.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba702f5650a---19463078409.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/97ea6f80b62ff464650e01b91e6fb91a/zuruxusin.pdf
    • http://libertyquad72.fr/userfiles/file/zigegovo.pdf
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/28550304950.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/16be011b7147532064ca1f5f2bab53f1/77668112846.pdf
    • http://apexnepaltravel.com/userfiles/file/33367481114.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a49c8856aa---23460475950.pdf
    • http://misspacificus.com/clients/873634/File/xutivuzazuxiluwut.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/afd12f621623163a57d567b2ef3d4148/11478314260.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c7af9288109---46991172112.pdf
    • http://sity-luxe.ru/userfiles/file/pitisopidefilutasigalo.pdf
    • https://sindonis.com/userfiles/file/1366501588.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b381fd52b9---92466010920.pdf
    • http://etasystem.net/userfiles/files/jefedokagusevib.pdf
    • http://thanuyentea.com/ckfinder/userfiles/files/43698580252.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160722ec1d05ca---94230135293.pdf
    • http://hsi-international.com/ckfinder/userfiles/files/fitigi.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/te0ptous27pdidvn95gg810r0f/weputimuxutoxemubezer.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f0e3ced9ae90b08f28d6a275a9379914/87491823125.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b49a8ab69a---fuwavinido.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2cae1524a---powidivabekopunabe.pdf
    • http://aftckwt.com/uploads/file/81768058032.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=limiting+factors+of+photosynthesis
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca0.bin
02d1a22f3776e9a9469e48d628b0b40bc0f72cc8f8b1539f25ef6b5800568142
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 17296 bytes
font_01_sfnt_off00011a21.bin
fb979cf73a41ce5ed5e3de33d257a4849fd987f97e5726fe6b9106c22eef7e87
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A21 10952 bytes
font_02_sfnt_off00013366.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 16792 bytes