Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e46e60f7089222…

MALICIOUS

PDF

80.6 KB Created: 2021-09-02 04:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5653c9d6c55514eacc72d39168666ea SHA-1: 599dfb2091a815789fe769fc5d10c1138a24473a SHA-256: 58e46e60f7089222effe589da12bb4374c20f765edc91c7ce06327233698c23d
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 of which are hosted on compromised CMS platforms or disposable domains. This pattern is commonly used to distribute phishing content or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://gld-lining.com/user_img/files/49338183176.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/8ec278c42430b485f0def1c62aaeb5d5/90725360261.pdf
    • http://nriloan.jctoursandtravels.in/files/69219690420.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/312a2350f148c0395b04eb14844f4af1/51263794644.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-6-11/20210611131756802264.pdf
    • https://brtim.com/uploads/wysiwyg/files/57364773477.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0698b861---98376970664.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612d35f3ed256---piratibafuwaferabuxudi.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160ffa646e46f1---fuvadu.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/57ff137822ea6542e4b2d299b7570cca/37805393521.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac45ff0b88c---64761643580.pdf
    • http://www.sm.ac.th/ckfinder/userfiles/files/rewovalepaxewasejefepufor.pdf
    • http://youil.org/userData/board/file/36822287825.pdf
    • https://leresto-niort.fr/images/userfiles/files/dawonejetufa.pdf
    • https://ivanda-commerce.hr/userfiles/file/83757471584.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b0af889b489db941f970cf7ea30173cc/5048306029.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16072b24f29857---vurune.pdf
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/tapemuloxavororimubis.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/ndr1b1a8c57qplgj240k692gh4/bedijefixisoba.pdf
    • http://popnmusic.fr/userfiles/file/saponapekanixoboba.pdf
    • http://yogaschoolofkerala.com/photos/editor/files/67066763153.pdf
    • http://zonazero.es/userfiles/file/76088491576.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a586e759e199f07b72b6cefa42a3aff6/zabapemab.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f00d51d452---julukikopaz.pdf
    • https://villamishkan.com/310renonew/front/images/files/53376813465.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=c%2B%2B+keywords+with+examples
    • 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_off0000d5b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 16792 bytes
font_01_sfnt_off0000edca.bin
d3975426342a465f0fe27dc00795400ef065eb9340f5beb0fd159bfade8fb1ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCA 16840 bytes
font_02_sfnt_off000118f1.bin
4f004fc6f722593b025006fe79d8341a78eda385d7c24237a828cf90b1821966
pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 10976 bytes