Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda67f1417f943eb…

MALICIOUS

PDF

74.9 KB Created: 2021-07-08 17:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6afd2340404cbe02632d0db1590d8eca SHA-1: c3dba25854cf8625f831d6ca2af9f4069669aff2 SHA-256: eda67f1417f943ebfde06ab02e28999128071d7adc992e3ff21c01b6230ed54f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous links to potentially malicious PDFs reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://cukiernia-waltar.pl/qcms/userfiles/file/xonoduteler.pdf
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/genebowarapuz.pdf
    • https://akproauto.com/nbloom/fckuploads/file/namezebowenuto.pdf
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/viroseg.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad012edd868---wotagiweposexulus.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/5b6ff8281f6b6ae125bb2bb412248720/26409285695.pdf
    • http://congtydaihai.com/upload/files/gosuvomokasitegufatolet.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05878c0114---zadezi.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd095dfe3e---45026955385.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d3c864156a2d8038ec653917ebc78020/kijanugawarumixuwibe.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082547280f46---nomiwufepu.pdf
    • https://digicpictures.com/downloads/31274970025.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c5676fe96---34130779229.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/34047be750e15da519301ad5a21e8042/8985745358.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01e450dbfa---91137296627.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9kgjhklppbvdlquhrkt0odcmen/sunegibijikusuwifawilebe.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da9e3cb15f---8626283065.pdf
    • http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/1497982273.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ebbdb48a5---24723969725.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980ff52f22e---56576455748.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/68682ed82c8095dcee51be2d97cb32b3/11497335311.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1da54893c---ruxexagevirumimopatezizu.pdf
    • http://sklepjola.pl/userfiles/file/29718128020.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/b14a1f43ac21047a54c0d47068b8c1a9/45224884338.pdf
    • http://esthebel.de/userfiles/file/gavizasasorenep.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pokemon+x+rom+for+android
    • 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_off0000bffb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFB 16792 bytes
font_01_sfnt_off0000d812.bin
1a57c9923e41d94f4dabd3dace5280ddd70d8b6508e0c16e302b581eba8d11b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 10400 bytes
font_02_sfnt_off0000ef8c.bin
4299d4b77dffa8f0287b43e637e86ffe2decffb653ee8ab329596fe6f4421356
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 18016 bytes