Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be60e3db3f514d8…

MALICIOUS

PDF

75.9 KB Created: 2021-06-26 16:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8a6f07dd559cfa09b4826c8a7d289590 SHA-1: 3e93872bf40910a8ef6db09fbe37d546bd9eb593 SHA-256: 4be60e3db3f514d84e0a4b7c29e5b63ee92612c81161ed7a5045ae1e81b1792e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, identifying it as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lead users to malicious content or phishing pages. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially leverage SEO tactics for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://delphin-restaurant.com/ckfinder/upload/files/47633069958.pdf In PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bc748f818---losomufuxanosokatigesu.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c352275d3c---malad.pdfIn PDF document text
    • http://geose.ru/userfiles/file/71335353606.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/03cae4505339bc466ae44740c9d82057/lolebuwakuzodizi.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789fd45b9a3---tabetitabevegafitetiset.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/zinaxoxanojejumos.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/narejumugofeka.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/c00ad86ecf6e688148266d172c9c3a6d/gexibomezogodekesav.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/jalinov.pdfIn PDF document text
    • https://menu2uplus.com/images/file/79801487674.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/wusafopivovupusowosulu.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/673207826.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae75703d72---51258160614.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/2bebe46e85a01fdd88c157e1b1727945/lunolanewagofovazinej.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/vujukabi.pdfIn PDF document text
    • http://castanienfamily.com/clients/74558/File/ziwivosekajujukiwaxu.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/duwoposoda.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/01ef25807da1130acf9540f887815405/dedujurimasevafubit.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/7637289152.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9150f5bba7---98923273788.pdfIn PDF document text
    • http://learningkey.org/userfiles/15355978543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=axillary+lymphadenopathy+after+vaccinePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC443 10980 bytes
SHA-256: 27d91728403c8b904f37aea9aa94eeb5ce746943f3dcfd86849c8af3e2ed2f99
font_01_sfnt_off0000dd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 17316 bytes
SHA-256: c1ac56378fa4f346bee61dd4259b122c3ccad29f1f7e1f791b268be3b674a16a

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