Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae50b94db65cc74…

MALICIOUS

PDF

88.3 KB Created: 2021-08-14 10:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f451acb27bbdbed65e0403bb8ace2662 SHA-1: b1c9dcea2ba6bb8caaac542b6bbdb8e255ec443d SHA-256: aae50b94db65cc74a91d6b060545aa9111b0933e4b650f4efe5e13819926cf96
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. These links are likely intended to lure users into phishing scams or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=disney+plus.com%2Fbegin+url+code PDF link annotation
    • http://tlxzkj.com/uploads/file/110949276776.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cabb8bb9d4c---pezusefabonutidemuxinuv.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/vazibilepunukexunojafe.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a7779db4c---kegivamediwuso.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c26e262d779---sexomi.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/dejiwuzesuxurexov.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/322afd52bfcd86f05ec98cacee91e0aa/lipaze.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/safulema.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a348b169d97---63104623628.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7769479199861a7aa6d2c02d7c3e2758/tusitudav.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/53701528924.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876a21b3c62---dadini.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/45147394514.pdfIn PDF document text
    • http://belst.by/upload/file/guzuvazonogumenuned.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080c381f368c---dimigexo.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/fotisibub.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d82ea3a2cf3---gobejipanebonuwutabanopo.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/058b00c9a7e030106a6c0f86f9ac0853/35349428145.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608699d4d0b8e---45290822063.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/jaxezasesupavogelulupuwi.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16087e9a45c75b---xujosu.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/487a17e61ece8fd390df5c6bc800a3b7/gigubebusuk.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074360e0e4c0---xamoro.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/95979148214.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b39a7d95919---72420446542.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608146de42215---ligig.pdfIn PDF document text
    • 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_off0000f234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF234 17664 bytes
SHA-256: 6f54bee38d9b8bb0c75d8b7a54df4f369ded738c4f058780fdda8bc212da01a4
font_01_sfnt_off00012073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12073 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001388a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388A 11052 bytes
SHA-256: 5accbd322f192eefad682ca1c50257ff1ecec11ef4e5e705ca77dd1144495779