Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82fce7898d175c4…

MALICIOUS

PDF

91.2 KB Created: 2021-07-06 11:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 189448b37bf20e526fdc4e6f7bef1c4c SHA-1: ca4421bc7d1a38a8184e2171f4b16feb40f8ec17 SHA-256: e82fce7898d175c4d93282e40c6218fb592dd70f9f39e3b0b782ae8aa02bed07
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://adsbudget.net/userfiles/file/69438417111.pdf In PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9366f90e8f---rarixigizopufesiz.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/goziwafab.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a43d3b6a5---96601256341.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/dunolugivopulovox.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786e16345fe---65908718707.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a0efc632aec---1240526473.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/zasorovugirupabo.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/vonefexuwit.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ce52470dbj0kk8i1bmar87s2in/59581663866.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/24334651605.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/vamovebifabixabugat.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860d4463644---zeniziwazuguminub.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///zokupugime.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/7054028688.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/c7gio830ek71o2nqaf36eer953/65224956058.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/40031960433.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608681a1cc442---12222910751.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/0073413f2c6a9cf5d33b9de02d3eb276/51947836326.pdfIn PDF document text
    • http://schokobrunnen.com/idata/vojanuvuxonavobaju.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c31ff0f84---43923603538.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/podesirameworud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=do+capacitors+store+chargePDF link annotation
    • 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_off000102db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 10504 bytes
SHA-256: 1a0ea84d437ad4955e965ca6ce6f57598b5766cdb08c131b752f9305fcdc3651
font_01_sfnt_off00011ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE8 17084 bytes
SHA-256: 31b22ec2f211deb6ff7a77cbb0ba02c97c46ed1e1c9d6bcbaf2b2da134de293c
font_02_sfnt_off000147b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1