Malicious PDF — malware analysis report

Static analysis result for SHA-256 04dab3bde1cbb4c2…

MALICIOUS

PDF

95.6 KB Created: 2021-07-19 14:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40b7135fa5c1ca5d40a708e09da080f0 SHA-1: 9b85e89a14e728caa38faab6d1f2bcc1bd2f7163 SHA-256: 04dab3bde1cbb4c21c1ba205046df1da9534e050d19bc30e1fa902bf5fa1522a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of links pointing to compromised WordPress sites, indicating a link farm designed to host and distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9404b845d146f2237dac541b69ca3acb/tomenujeravegedepajipunem.pdf
    • http://d4svancouver.com/clients/c/c8/c8601140a4283eb9b700f388a83987a3/File/8342893066.pdf
    • http://antonio-pelella.eu/userfiles/files/kasusazu.pdf
    • http://daydala.com/userfiles/file/24029478510.pdf
    • http://webdulich.com/js/ckfinder/userfiles/files/69448991907.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/3f5407d7ed29cd541f321b47c079f9d9/82523852921.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e67bb8abd---19327381100.pdf
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ziwenowepezevamamuwutab.pdf
    • http://minhvuongthuphap.com/upload/ck/files/19785195694.pdf
    • http://hytechplus.com/userfiles/file/fazoxi.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607946d1c5cd1---sujemorerepu.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/e4fa337f68e43a6b3bb06db791d2acbb/luzijiloripexiv.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094e9216c9e5---22461813980.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160996e4a9da4d---22296764311.pdf
    • https://www.borzabadi.com/ckfinder/userfiles/files/66178869670.pdf
    • http://medicapoland.pl/uploaded/file/dogaxenopi.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cc3dbb0fa---tebofupel.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/671f2806590ef30108675745213f90d8/71030214395.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad2f8c4e43---sajegukolamumaxat.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/697fa767d3ea39f8f97c83eb4db0d6e3/77949052021.pdf
    • http://gialtour.it/themes/userfiles//files/zejokuxuwufefademozudiwa.pdf
    • http://mimpi1pusat.com/contents//files/xapakiga.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607447267a264---zabegedelibawusuzizuv.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822d2b7118b---kevenedetolene.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ab49e925---95161377649.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=digital+subtraction+angiography+indications
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085075bb77d2---88035623662.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_off00011218.bin
bc95a8b2a613f7456b93d794288fefe5422707f984d312a7ef32a08dbec84ec8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11218 17180 bytes
font_01_sfnt_off00013f46.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F46 16792 bytes
font_02_sfnt_off0001575d.bin
0fe47ebbee41cb7db441c2966edcc14dbd6ec504c36ab73cef1440f232719dd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1575D 11016 bytes