Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f8ae6fa744d06a…

MALICIOUS

PDF

73.5 KB Created: 2021-09-21 03:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eee67c7dfa6b7c8b16da1c326ad1e9b5 SHA-1: 300cc98ed01ee85ccacaf63d946359aab91ef43a SHA-256: b1f8ae6fa744d06a4c366d653aea9d81f990cdfb27579a3ba374958a2556d25f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'SE_CALLBACK_LURE' further suggests a phishing pretext, likely aiming to trick users into calling fraudulent support numbers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ketchas.ru/uplcv?utm_term=map+editor+gta+sa+android
    • http://tasarimak.com/ckfinder/userfiles/files/dogatukusonisafozutabef.pdf
    • http://sport-zavora.cz/data/file/wapojigufunizepamaki.pdf
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/dunenabofe.pdf
    • http://nbkhjc.com/uploads/202109/file/210904090044918592artvnoy2n1g1.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/031a950a9615620e6b19a3068b951649/77787588641.pdf
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fiseje.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a8f5d7a32---84217045023.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/62hnj4qjo13aafd9cstkvq54h2/zenitisusobewuton.pdf
    • http://cc-loges.com/uploads/file/40776188925.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffd2f22974---betiselusiwumutefegutemat.pdf
    • https://mr-alian.com/upload/ckfinder/files/45963677335.pdf
    • https://vasantviharproperties.com/userfiles/file/dugelakobafivivuselekol.pdf
    • https://aayams.com/userfiles/file/27793367456.pdf
    • https://vr-spagna-20.effievirtual.com/galeria/files/vobedujivub.pdf
    • http://engroupe.ca/aym_image/files/1754267674.pdf
    • http://space-edge.com/upload/files/sobowurovivisonosinizer.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16146d39f70a2e---6521457869.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/fe974caad17c7059321d852bf8a9068f/mufejuxozabibel.pdf
    • https://typeone.com.my/ckfinder/userfiles/files/zisudi.pdf
    • https://blueparadise.pl/userfiles/file/78354679610.pdf
    • https://hotelpancharatna.com/assets/userfiles/files/sasenupumiradajap.pdf
    • http://vibratingsieve.com/d/files/widenuwinoris.pdf
    • http://mijn-nederland.nl/userfiles/file/65199827093.pdf
    • http://bonsite.nl/phpcmsys/file/82351785336.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f72960866d---56072683246.pdf
    • http://rpsbchamber.org/editorData/file/39726168399.pdf
    • http://gbfrjournal.org/pds/userfiles/files/97479055655.pdf
    • https://netcsemege.hu/ckfinder/userfiles/files/wenoxewologevaxesitizulus.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_off0000bd66.bin
1619ffc152e7e6bc5ac31b60f39dfdb579705c752a464ddd9a9bf25fbcec162e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD66 10516 bytes
font_01_sfnt_off0000d53b.bin
d0da349c9d729870fce180eeda592a30aa0b635671af6f426078842e47b89ad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 16668 bytes
font_02_sfnt_off00010075.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.