Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee50d3a0e3a3064…

MALICIOUS

PDF

89.8 KB Created: 2021-06-28 07:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6d6445deb5bbc699ecee0df3ca96158 SHA-1: dfe3e0b1a3f218f68ec16d4e4ed0fe375c8364d9 SHA-256: 5ee50d3a0e3a3064a83c0cc2e50e86c760d4cbe9656c7a9783e370d2a7cae505
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/qm4lvckc7eqlakjhb881b06jhn/49183247913.pdf
    • https://debcopharma.com/userfiles/file/96172741373.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53092550ef---36371788466.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7594738ab---nazegu.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5e27e0881---99342050597.pdf
    • http://uniquehotelsolutions.com/files/others/60865207748.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b14a3ca56bbd8bd491d994f558bd587b/91577759561.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4a4b37287---61771234046.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/kbscfhq68da7vud0vpth00eo85/22839647187.pdf
    • https://businesslife.com/content/file/mifusinipixoregadini.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/pv2uo31qqdsc18v3ua8vru6v0t/soratama.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a83dee9f99---31583476510.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/4d9adda33616e54dc3092a18328e4d37/demanuno.pdf
    • http://gat-asset.com/CKEdit/upload/files/30771293969.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608063e5e54d3---kimadeporuza.pdf
    • http://constantemails.com/userfiles/file/162286359329676434033.pdf
    • https://whitesal.com/data/images/file/5284_20210524043205.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/cd0205aaa9c6d0bfe181cab4ce7af33b/gugoxomukatuzorobaliv.pdf
    • https://gilbertems.com/videos/file/tubizaxevurokamisopado.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/85a232d9275c8c1e0bab7b72eb7fd8cf/ziwike.pdf
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/tisemedaveguzuxodifi.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/9ad32cb7ce2456e5a5d31d3e4fab3b7f/52970045776.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a37007d04---lazibekebe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=asian+food+store
    • 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_off0000fed4.bin
a82b8667b8f3abbea63141bd9171fca549433ea0c5d6e24d40f1edc33ffaa798
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED4 16980 bytes
font_01_sfnt_off00012b01.bin
4207bf5a4ff16764b204b2671c3a849d9fbe77e09ce56f306b2cc5543fa4d8f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B01 10280 bytes
font_02_sfnt_off0001424e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1424E 16792 bytes