Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e01237e814b4ae…

MALICIOUS

PDF

84.5 KB Created: 2021-09-02 15:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ec69c535749d60b272cc92f5ad57a6a7 SHA-1: bd81049c24ad58a4304899d80c7351a20cce510b SHA-256: 12e01237e814b4ae62161be689a432562c24215cdbf5e902b318b24906460602
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is used as a lure to drive-by downloads or phishing sites, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://infrive.ru/uplcv?utm_term=shyamchi+aai+book+in+marathi+pdf+download PDF link annotation
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161195d8a14fd7---80871047263.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/55462123306.pdfIn PDF document text
    • http://inistor.com/ufiles/files/wevijuzoposemoguv.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/mumimijivosima.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/441b780b9dd058e1e4eea91273a1ab44/95007257195.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/64784978673.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/3d56ab5de2ad4b44572f5205043fb31a/zagisokawefisa.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/rugefak.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/39219379698.pdfIn PDF document text
    • http://pekbdt.com/filespath/files/20210829164447.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/mobudusurebelesozuvor.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/8fd08a784b115387cfd234c40ce0dd26/tudawogogogizepezape.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/15314479611.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16103b3afaacfe---83554395007.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/fosez.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/d6f9ff31a6605c6f294e5448c2e68887/62009114026.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/88014666338.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076e51cc21ef---19431006610.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160babe8639745---10620116744.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/wogekinezupabegakisaj.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/11680047879.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091cb8ed8942---74641585621.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210508151022.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607da2caebe4c---pusoxupikomavi.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/kopaturozu.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/39680135134.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079e732a4517---27697386515.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 21116 bytes
SHA-256: d713022a719bdcf28a07504379fe96e6249a09e39e91c752f39c75b6d33591dc
font_01_sfnt_off000112c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 11092 bytes
SHA-256: 11d89192573b142493c8e9517a7f1a90869750d500f15b8a0d31ba7298f452d4

Open this report in the interactive analyzer, or submit your own file for analysis.