Malicious PDF — malware analysis report

Static analysis result for SHA-256 d685a3f47aed95ee…

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 00:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 058cf94abd840f83617f3f5d9b5050ad SHA-1: 980b3219538627cd54c146054abbc86ad872fbd2 SHA-256: d685a3f47aed95eea3abf32831b9bb73b415cd35e92e06b7110b1acc1a6946eb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bsinteriordesigner.com/userfiles/files/jirubovejofemekabakajaf.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/nidejixo.pdf
    • https://lionkingbali.com/uploads/file/wokijabofel.pdf
    • http://abogadosaguilar.com/ckfinder/userfiles/files/97078224753.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b87cf504e96---51902104901.pdf
    • http://sgyscom.com/upload_fck/file/2021-6-9/20210609150336932786.pdf
    • http://casier-a-bouteilles.fr/file/13735085189.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/p4eofeaqoqn5bkopsmetcuik7c/sivotixatovarel.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/2f35d5620f9b3d803649f08c9a49962e/zefawisuse.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d7b0869ce5fc6aa09c9aa045f667048e/60268365127.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/oqssmlv0nve4jcsqgpf6fsv6c6/89508045909.pdf
    • http://np-laser.com/upload_fck/file/2021-6-26/20210626050529501931.pdf
    • http://www.ufolep-69.com/contenus/files/vutupewumo.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/b0560cf60d6a2fac513308bcdf6c36ba/46221873784.pdf
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/6850760115.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/31sqsfj6f9a568putcncbfbms0/19848217577.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092ad580e95a---71045788650.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/hgnmkhg090ngrf8c3pekmi1eaa/56008021127.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18a4e9a10c---redinajaterefop.pdf
    • http://bwc.lt/i/66572835681.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1cadf3132---jofuzudanojija.pdf
    • https://maryamghiasi.com/images/upload/files/70906453749.pdf
    • https://stratasphere.online/userfiles/file/39109499882.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c28d567ba82---fovizinowenurudivugojot.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/kifolozozewepumemewa.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/9bsrv4peigtl7oipehk2mh7gdt/86841540379.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=chinese+table+tennis
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed50.bin
f286f32029fbd48a630eadbc58df233672c1051c5d903805ead46f01f9d4a979
pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 10156 bytes
font_01_sfnt_off000103f6.bin
e870d43ce93d6494c3742c472ac8066848629962e746861d9d6391750a30df10
pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 2088 bytes
font_02_sfnt_off00010d35.bin
b13b67d993f35c6f45190a70e3cf8c700dfde5f52d46c110f3d36fa784324c6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D35 17092 bytes
font_03_sfnt_off00013904.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13904 16792 bytes