Malicious PDF — malware analysis report

Static analysis result for SHA-256 0604ec871e24e3e8…

MALICIOUS

PDF

87.6 KB Created: 2021-09-16 02:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 33322687ede34c721e353069b98827bd SHA-1: ac9dce786ef6b7411868d4c2c5a0836805d3a6a6 SHA-256: 0604ec871e24e3e806707216ab4d531aac5871f6b74e97646186dd80f9f88005
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the nature of the URLs and the PDF structure align with common phishing lures.

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://pixomot.ru/uplcv?utm_term=mobdro+on+windows+10+laptop PDF link annotation
    • http://candientuvibra.com/images/file/legokuwoxaxabudujeregeb.pdfIn PDF document text
    • https://masihpt2.com/contents/files/90288312960.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/jowemofujemusazosakoro.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/aa87c3307b5d34f6e1f36756324600c5/37136739202.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/17283282023.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/vitisidaraz.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/lebupujenojefafamasituke.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/kerikufebabeva.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/76499115691.pdfIn PDF document text
    • http://suaups.net/userfiles/file/zatifutefif.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/70289847116.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/15806446401.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e906826894---12170692345.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/74602603795.pdfIn PDF document text
    • http://pb-book.com/user_file/file/59796940566.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/ranorepakegosobivamegil.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/3620346214.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/musozenijoxonalarovali.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/9p4r4qpo1jc1ngeh0bikfltlc5/wusex.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404a9a4997e---12627661929.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/8ffql8jsn4qfv8cgesrvklup4n/7389405541.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/turipikeruwekogux.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/dirogubunuw.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_off0000ef98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF98 18052 bytes
SHA-256: 16ff7f86ec1532427249f72d844d92dd4866189d941d6a77fb9c2d7759911b49
font_01_sfnt_off00011e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001369b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369B 10644 bytes
SHA-256: 883496b2d68649a9584fc144219e52791ca87c6ee91368eecd9f3fd7308b437e

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