Malicious PDF — malware analysis report

Static analysis result for SHA-256 e806c323974e9c26…

MALICIOUS

PDF

112.1 KB Created: 2021-05-27 00:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8e854fbb2f1f0fc46a540121c1e9642f SHA-1: 49fe15c2dd8f112549daa6f6dba9b1e6ea384621 SHA-256: e806c323974e9c264942d60e898bbbd6a3a23fa1cb72adfdfa533514f7ec74ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/dek8hlpv02tid1mq123c634hk6/fulotavida.pdf In PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d827418adbd90a55b4a2f519dc19b47d/zawenixalakuw.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/96557940731.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/47928264676.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085d8ab33e16---78148756454.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081351c23a80---70828416250.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/lepajapujebujave.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f8cd32fb---jekewotik.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f475f8465f5b412276cd07355a7d26d4/jewexasiba.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/87056735669.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/767719cca0d8d421cf2bf2af8d218c85/pufafoludupezonefuseram.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/90244096625.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160834417026e2---rajoxivutekajerumali.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6d5f105280d72d1ddac8256d1fea7b05/26543224552.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ers54r3terq082c2ma8gls6qbj/47918240382.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/gaserawide.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070358f39d64---43891031596.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/hbdhmc4run2jftjqnemetgvd2v/jepijeme.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e1771dc590e9e580537d854eae03ea4a/jukupemikilufokukimububa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=best+base+build+for+clash+of+clansPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC3 5180 bytes
SHA-256: f3e0f84495c6e98cf95b1b89b1c5b46d220584cb1448f84f405d53d208785ad5
font_01_sfnt_off00016042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16042 2196 bytes
SHA-256: 121a9ab0346e956f82ae6f0e038a9add19b05bdcd256cdd7ae7f382dd0550f9b
font_02_sfnt_off00016a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A41 10892 bytes
SHA-256: 258c3dd01ee2a2d3c5e75a522ad722900192c73f6456ac41ba1484c2bd70fcea
font_03_sfnt_off00018f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F80 16084 bytes
SHA-256: 096dc22bd3c9caec6309818842dfa19dd0da92d8ef7919229ff7edf1d3f8df14
font_04_sfnt_off0001a436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A436 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f