Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2175f7b33b1ab7…

MALICIOUS

PDF

84.8 KB Created: 2021-07-16 19:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 694a8f2044cb0f0360067519996763de SHA-1: b979528959a8b3ad30d0d2c6ccf3ae65d5e1802e SHA-256: 2d2175f7b33b1ab7d69a5e7379d2c4d589e8e9b0f2d3f799b3c53c52182ab8b2
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to compromised or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979b6d2c9bb.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/1ausokl50hc9ovavnkhg13hou5/6788905512.pdf
    • https://ahreco.com/uploads/news_file/pegesetipew.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb1c7872f5---xosixowabadelepomaba.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/c73324185dc42ae77bd194ba1933a262/monodikovogaweromijubo.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/14019056080.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/502ed88bac61657018da52a8a5e40354/nesazisumakubadatobanafip.pdf
    • http://accessiblevehicleservices.com/userfiles/file/24465094557.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/f76f65d50156d3b63848a66a897a5d22/ruraromufaj.pdf
    • https://wemservice.com/ckfinder/userfiles/files/9784054318.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/b0b3020108012b1cc930ceba32eb0108/dupakurejagotevofagexa.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a8719dd91f4---99971283062.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081f4727d008---7113745418.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e48571c595edee78630c4ffd69e582b2/firakoligitaxopinifurukon.pdf
    • http://cokhihoangvinh.com/uploads/userfiles/file/8024504697.pdf
    • https://bikidi.com/UpFiles/WebEditorFiles/file/49242748910.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/0bcd88a2eb9521f51349002992c1ee70/54970603085.pdf
    • https://klairtransport.com/uploads/files/33523631644.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a37f546a62---guxutezipox.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/35409498729.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e63245c99c0---52717945089.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160715dcd3f632---67838026963.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/9d1d9f848acbd3fc1aabf5380d346403/xadunedid.pdf
    • http://michardardillier.com/ckfinder/userfiles/files/37022875865.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+you+know+when+your+water+breaks
    • 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_off0000ea5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 16792 bytes
font_01_sfnt_off0001026c.bin
394a8b51f779d5e4b61efe25e5e41171b994687183d78ea284d6f4bb952761a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 16760 bytes
font_02_sfnt_off00012d8c.bin
f6aa8f425266a419c94f4d38cc6a238d6a3856b4fa8afec592ad4f3173d4b145
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8C 10592 bytes