Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0c1791c4fea35f…

MALICIOUS

PDF

78.6 KB Created: 2021-09-01 06:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bf940d04d8a48d3a72ea7fd743ef3b34 SHA-1: 05c9cfcd64f1ba56109f9c0fc6dda425500869f9 SHA-256: 5f0c1791c4fea35fd10ca9e6f58eadb1cfd157f14276d289b7c0dbb4f8d427a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb913d5d96---88732875585.pdf In PDF document text
    • http://tochalco.com/uploads/files/loxinorutelib.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160c6be24645c7---23226160553.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210625101206.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/45034720510.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/pebobexaxi.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210615214407_fu6k1k.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16082115faee45---fofebutovobiroga.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/bcedca9a4c7ebb8a0a8ce9db9756551e/bokakarumirumufariro.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/jozixot.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/vivavozozakevakodemif.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/11218111344.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff9a512657---69447819657.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/29020534813.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/vu5lnojpkjdk38nfs4udaj3c62/dikomenisunifi.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/bokodifuxekuwozirimi.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/7frhc7847a17sonb7tl1ssdkq9/sexaz.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071d03272c68---sigagedevexebumisudi.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/jepavejezegesulisuto.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/duwubot.pdfIn PDF document text
    • http://seritour.com/rsm/files/6314605128.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/giximesup.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612011e140747---83145546190.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=cookies+cakes+and+morePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE436 10512 bytes
SHA-256: b299902c0953dc528b50650e0a3ca1e2a85f2da2c1d8156f300cbd4747dcfa2a
font_02_sfnt_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 17752 bytes
SHA-256: 437c5968f739fa3969cf9685aa463a2d782e3bff41e36daec3436695e1efd55b

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