Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad003365114e9eb5…

MALICIOUS

PDF

84.3 KB Created: 2021-07-22 17:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68ed114b705ace1802950828cfdb78aa SHA-1: f0e2184f2a9b5e1db23782af69d8243ad7de0122 SHA-256: ad003365114e9eb5157ff19c535b6948ad0dc654f5727a208cca3564cbd22698
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/722f106824ac6b8f0579c8730ba9356d/971798260.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5ao14590fn0epo20c4qauukue3/90251000421.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/qv361q4r2eumb7ifn0h8hccn2i/jovunubataxis.pdf
    • http://fkhd.cz/data/img/75268771946.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/33762c4b7e22670cbc783ba3c17bd339/polerobotevukabesidisenem.pdf
    • https://flyags.com/editorResources/file///pazipetudixejifipug.pdf
    • https://associazionedynamica.it/uploads/file/59172090616.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/ba8de462485ed75b5f8362dd1ac451d1/sumobasukezufasibabaseviz.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160775ad176231---fafidena.pdf
    • https://africanresearchcenter.com/userfiles/file/vorokafufapevakofidawegi.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f4a5bc5cfbe6884e3207f626599eadec/mujofomepoferopurikudo.pdf
    • https://mimpi1pusat.com/contents//files/fuferupetuzujituwepok.pdf
    • http://cy2hand.com/userfiles/84312929601.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d18dde4fb53---falewatilatimox.pdf
    • http://chinasoftcore.com/userfiles/file///narafuka.pdf
    • http://zeguvietnam.com/uploads/ckfinder/files/36158810436.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/462c5cbf99595cc7af309ea44f41a9c2/36767347170.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752a4b75309---52077780454.pdf
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/julesojola.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/5aded68099a27177e0f42c1b0ea63936/38137921477.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/11616226716.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076c812a01f6---meladopadowi.pdf
    • https://pharma-tools.eu/galeria/file/43693049801.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=fundamentals+of+chemical+engineering+thermodynamics+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_off0000e328.bin
a30af03a5ba4bb98d4f1d0e6c9e09492c7c84aab9ea98b6f1e36a42f6a44f6e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 16660 bytes
font_01_sfnt_off00010ed0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 16792 bytes
font_02_sfnt_off000126e7.bin
4ccdeb78f47d0c00574f4b6189d2f165387052fd17610a6beb8f56142c6997f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x126E7 11256 bytes