Malicious PDF — malware analysis report

Static analysis result for SHA-256 af093e223e296974…

MALICIOUS

PDF

78.0 KB Created: 2021-08-18 13:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0d2cd7cc7f1014eb69b480f6411cdeee SHA-1: c8ec01586858346841fb5628a7e1f3ace0a89148 SHA-256: af093e223e29697485cace98f0fb3285432958c5b7d5675ec43c37d5a99346da
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links pointing to various websites, many of which appear to be hosted on compromised WordPress installations. This behavior is characteristic of a link farm used to distribute phishing content or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4ae3f4b0b33a435f8da069ea0d6009fe/56045826444.pdf In PDF document text
    • http://artside.org/data/temp/file/2255603256.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/klc33r5p19thqjudkb3rfns30u/motasazikuxijibipegabivo.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/14710106706.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/89828608169.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609a71a0de51f---88171093721.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/20316782487.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5a6f437243ce5e0f62ee511e3cfe3447/71521735208.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/xexosagukob.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/kowit.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/44135504898.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08bd987f9---kisadizaf.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a91aa601---36040204164.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607426ec3dcc4---bupamilowutup.pdfIn PDF document text
    • http://fairmonteast1978.com/clients/71195/File/dupivotagedek.pdfIn PDF document text
    • https://agatanorek.com/files/file/73589159479.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/16372444002.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/jevitokagejarikanotax.pdfIn PDF document text
    • http://burnettefamilyreunion2021.com/clients/867108/File/rixenujifipirimojozesutim.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/xalamoxixikago.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/foregiwolomase.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c522583bba9---69995245183.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30a6dc4b19---20198752141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=panchatantra+stories+malayalam+pdf+free+downloadPDF 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_off0000ccad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAD 16812 bytes
SHA-256: bc0d9dc6926bf754a4d7985cd6414a03b5c65556df97deba9a4b75c0913ed216
font_01_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 11088 bytes
SHA-256: abba1432bc7a0e5327c364227d9a6a62e8bf0be01c65a35c49ab6dd800934875
font_02_sfnt_off000111f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1