Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4707ad22d2dc2a…

MALICIOUS

PDF

89.7 KB Created: 2021-06-29 21:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 470d5232b5a4cbf51a41eedc5e034a88 SHA-1: 96f9c17fe80abc4ef702f8c746e6144853bf92b0 SHA-256: ee4707ad22d2dc2aa713c4b909ab4357c788cf703fad434f53f50366b2983a50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to phishing or malware distribution sites. The PDF structure and embedded links are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://queure.ru/uplcv?utm_term=employee+satisfaction+project+report+mba+ppt
    • http://sysquare.com/UserFiles/files/65340307834.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c85f540e9ed---13900886088.pdf
    • http://www.tekkoo.net/images/library/File/71641267642.pdf
    • http://bclgrouptt.com/userfiles/file/xagorufes.pdf
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/safuvatet.pdf
    • http://www.hussco-steel.com/husscofiles/files/dofovejila.pdf
    • http://nandeestationery.com/userfiles/files/mekowakusirixukiti.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b074b1153c4---xinakagokapitop.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/674343b8f7f674e76d8529701a4fec60/bojaj.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9d783ddc272b7b88ac7e78d5cbe45b35/talizi.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/340eaac0c9692f3d6940d77ae4aa75c0/bogepubagixovamanigesif.pdf
    • http://lawrence-spruill.com/clients/42275/File/47525028126.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec031ad988---dirimemupi.pdf
    • http://acpiindia.com/userfiles/file/lozogusixonu.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5932c4b600---97156577384.pdf
    • http://lubrifianti-auto.ro/files/file/83374786306.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92abc6e28e---40075533238.pdf
    • http://planbmedia.hufiles/12357988045.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/1seqeifsbghsemsvlae5fhg2as/xadaraxevumevis.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/c4fb1de729911de6c246e886c362dbdb/16996589382.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f5e486406815d6891f9152b4f841ce86/juramu.pdf
    • https://elsa-daulte.com/ckfinder/userfiles/files/19565541178.pdf
    • https://eletvital.hu/uploads/files/514307284.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8529c03124---83597328509.pdf
    • http://biirbeh.mn/images/content/file/47539762835.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 16792 bytes
font_01_sfnt_off000112df.bin
6473d88e7ccea7c74c56521dce77697b6aefcb9728932cb0950aa32dfaaefe0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x112DF 11008 bytes
font_02_sfnt_off00012c3b.bin
c0c8703da81e7899dcc990c7a71e7fe6d26ae3e11c628c6315bf1e233bba357b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3B 17316 bytes