Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eddf4de61cc75ed…

MALICIOUS

PDF

99.5 KB Created: 2021-06-27 13:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85f4d1167eb44096f112c3dc001e7361 SHA-1: ae517bfc60001f5a9c14b02e9de5e07f1f5a34d5 SHA-256: 1eddf4de61cc75edb0022f851b90ff358d451cc8f271749e3da049044e3d141e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607addeb969a4---nivedokisoxa.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c31e58d285---zuxifibugetogekun.pdf
    • https://abofahed.com/userfiles/file/77326406915.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d81cb06538---18508698733.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/3226d5b504f65793b35cac653202ebcd/2336581015.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/vlgq2db6jaakgls50afuifj7qg/44218994895.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/fe84b46aa3d83c5128d218d00b768238/lanemepezifomexoduwifidev.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/c9ee5e18a0f475ea0720db46a242251b/69301449037.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/62df085cdb8a18df39b245397a7a0da8/xinawofidexajaxumi.pdf
    • https://kp-bs.ru/upload/files/2013775585.pdf
    • http://conservativista.com/js/ckfinder/userfiles/files/kuximevazuze.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9d6f36404---xurobego.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/6b9d05e91863e3149a4a62f7b7becf4c/71581863548.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/boropiraropalaselovofa.pdf
    • http://cnmrobotics.com/files/files/85278073102.pdf
    • http://lab4050.com/upload/editor/file/62725527776.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/bc693348e3b275c6996252f893617405/vatez.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/e447d1b6c06b5840ed0a948e010900bc/87369661662.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63a38d3a8a---62862237108.pdf
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/293aa37i48hifv4l06hgih0lt1/vigotadatemapatovijuwufav.pdf
    • https://prtl.pl/userfiles/file/77972943919.pdf
    • https://moto-trend.cz/public/files/fck/file/33542371849.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/cbf604004504cc96c7039fac021141ff/roxudigisiwapero.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe0b4f485---53270568916.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/45114d2f8aec7e962e0fa4dc085c18aa/47458342087.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=yes+precure+5+go+go
    • 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_off0000f51f.bin
f03f12e11835e87935ba515ace4be76afb7297b1f870020e54c42a40f574b3ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 10264 bytes
font_01_sfnt_off00010c65.bin
8b177574f9893a35bb6ca83ba2e2a2d219b2ca4626068f402e9e8c0d2df3467f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 18680 bytes
font_02_sfnt_off00013bb4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB4 16792 bytes
font_03_sfnt_off000153c2.bin
5b2c0df5da526ea9cb7c21e69306b94240f7a13112ad3dda4bbe0fc53bb9ff2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x153C2 13676 bytes