Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8a5a1c40d717e8…

MALICIOUS

PDF

80.0 KB Created: 2021-09-14 04:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8507a773c8782e4f536560ab0e25fcc1 SHA-1: db7e69ef2d0d9629a32cdd310619635405ebf3d3 SHA-256: 7e8a5a1c40d717e88a8eb3019bf9e49bfc03d33b835bc4b2305d11bff08ced5e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely aiming to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=turn+on+parental+controls+android PDF link annotation
    • http://zenobiacultura.it/userfiles/file///69203041227.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/72b45cd6dde213a7955339bea6c06bbb/77442904518.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/11867602865.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/40454544132.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2vsb2t0bai55k4ccisi7fngcmn/zizoladasiterapu.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/68965746066.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613542a461459---10699745752.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/fikebemevodawogorare.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/jebakapigosososelibepev.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/18345759740.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdb2c38dbd---jowisove.pdfIn PDF document text
    • https://baglab.pl/galeria/file/wasiwutu.pdfIn PDF document text
    • http://afro-safari.com/upload/files/90152225128.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/2979258488.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/364283029.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/99413646927.pdfIn PDF document text
    • http://jaatkinson.com/userimages/92088315041.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613058ae0ee75---kitotuwi.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///40092884859.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/13707032332.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/fumosapifegademunori.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/riniferu.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/kotod.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/f41d2ae6b5a4e8e4d0ce5cc57f0cb401/vanuwejex.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/revezugomafikara.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 17976 bytes
SHA-256: cd9dd6689dbe769e7fb53585222f5a02845be1f9929872838aa53b8326ef5a9b
font_01_sfnt_off000115ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1