Malicious PDF — malware analysis report

Static analysis result for SHA-256 978a86182c20b119…

MALICIOUS

PDF

98.8 KB Created: 2021-06-28 04:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f20efd279b9ef3e9a48db709f4c22252 SHA-1: 8133844ee4ea465c304d5deaf9946511dece395d SHA-256: 978a86182c20b1190346ba3145420b2a922ed26c81549dea9956e6f81e2b2da0
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites, including those using WordPress uploads. The presence of these links suggests an attempt to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://allmassage.net/upload/file/20210508060016.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7df23ffd7---jinif.pdf
    • http://yaeram.com/userData/board/file/23609082616.pdf
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/1939857498.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609304fcdd1e1---mofoda.pdf
    • https://sieuviet.net/webroot/img/files/joforijoledujaxade.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89f1267e09---sokuzukojogejot.pdf
    • http://tevukasveza.lt/ckfinder/userfiles/files/75154608077.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/bv9bc8lc3c3o9ep2ahc3c3su4u/19038751413.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/5c23be16f9d39e4d38f2269d19139b02/vewugoginifezenobalebevom.pdf
    • https://aimara-bg.com/userfiles/file/devekiseminofa.pdf
    • http://maszyny.pl/userfiles/file/52431036648.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160821d832762a---58527344424.pdf
    • http://novichiha.ru/pic/file/mimalogopipo.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53899ec92e---11036736982.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/8026d59856ace7a1de491b7a84b87979/gizaxono.pdf
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/kajezisoxuwobal.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/c9918cf476b1478b4b3711d64541ba07/15684358463.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6100eea0688b2fe9f8dce1ffa3e9495b/95930745276.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40c2e8809d---1037782441.pdf
    • https://advantagelic.com/singhania/downloads/file/11215287294.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc41575780---fivuxi.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609318095fb24---96304871684.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=tuber+crops+meaning
    • 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_off00011fd5.bin
672b06f4aecacc06afb07b848292e5aaa7d9023ea5ea281c5135291aecad5343
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD5 10776 bytes
font_01_sfnt_off0001386e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1386E 16792 bytes
font_02_sfnt_off00015080.bin
e472e9741e44007b2164c7299a21a2f4ef60ffc754b97a5a452e9c14ca66aaa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x15080 17540 bytes