Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ca54536c47be98…

MALICIOUS

PDF

85.7 KB Created: 2021-07-03 07:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15ce605484a6d127379429682bc1f6d3 SHA-1: b06f8532068d8e1ad19080ba0b686cc588d5a045 SHA-256: d6ca54536c47be98295d2a6d5f045cd34b047fa7652d987b01687142141f0d33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable infrastructure. The embedded URLs and the PDF structure suggest an attempt to disguise malicious content or redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad46ff5f268---raramodakexavulez.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bda514f3f---58110818685.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893fec94448---38190919481.pdf
    • http://microsolder.hu/userfiles/files/duzizit.pdf
    • http://ackerviewguesthouse.com/userfiles/file/wareluginagopuwitubadaru.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/0o3srmq58hanpbt2biifejmcrv/jaligamutijamebozotaxube.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe1f4bc1a2---newefedebagelinobopemo.pdf
    • http://ilturismoinitalia.it/userfiles/files/52951522899.pdf
    • https://locktactyuma.com/ckfinder/userfiles/files/84095225739.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609695cf2a082---lewusoveminawuxixigol.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a59776718---xozivuxojowe.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8ddf70ff9---53714455320.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ade20196d9a---zuwijogota.pdf
    • https://fanaf.comarticle_ressources/file/masor.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1e4f13b0c---pekokavapup.pdf
    • http://scheiden-maassluis.nl/uploads//file/kavun.pdf
    • https://vildmarksjagt.dk/userfiles/file/kawuxarofabedetolerazam.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a14f71025---18701143788.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804bcace7e3---wodexave.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/vqc8e0v5d8umuq24ju9utklusg/xamowep.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/78siof9jnvltdv9bsdoq2nua1e/fajovekesudawagezabuleb.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/8a22e714f5d6f517619aaa7b0b45c217/48081625346.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b30ee11745a---dugajexejimutuzu.pdf
    • https://zoomkish.com/basefile/zoomkishcom/files/fofiserokiterukatote.pdf
    • http://mashtalkandil.com/userfiles/file/xizibugona.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=a+practical+approach+to+the+study+of+form+in+music+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_off0000eaac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 16792 bytes
font_01_sfnt_off000102be.bin
7d52f0f685377ccd30b8d49b65c849ae1b9f5d5af87b7b1689e8af00c1b6f30b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 17080 bytes
font_02_sfnt_off00012f46.bin
7bc67515bc4359ffc5cafdc9c71a3711461336b4cf2ade9464d9bbcd6fd05b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F46 11080 bytes

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