Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ce6abeef2a3e03…

MALICIOUS

PDF

84.0 KB Created: 2021-09-21 05:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69e929b62d01f81bf51d2851c2c938dc SHA-1: 170d40560be2b4be17e31c6b53b04791f1426d78 SHA-256: 49ce6abeef2a3e0398209cabf4fc0a7dbea1266f8728644b433d7a51e0b6b825
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by a ClamAV detection and an ML classifier. It contains numerous links, many hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to lure users into visiting external sites, aligning with phishing or malware distribution tactics.

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 http://klick-tipp.at/ckfinder/userfiles/publics/files/61276806753.pdf
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/19347547274.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210918_ECAD4B1ACA3B2C5F.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d99839c8da---zeketegasux.pdf
    • http://baove247.org/upload/files/puriwurode.pdf
    • http://zensushialiso.com/uploads/files/1773148216.pdf
    • http://mmckno2010.zkosuchdol.info/files/berunijovaloveroritobu.pdf
    • http://kunjipsc.com/uploads/files/50952296658.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/mhjiev7sloh2unccq2ia9e6oq3/nobide.pdf
    • http://fd-health.com/upload/ckeditor/files/40674538699.pdf
    • http://tieulongcopro.com/luutru/files/pepel.pdf
    • http://tccsrl.org/userfiles/files/6964999069.pdf
    • https://tsegypt.com/file/8321787177.pdf
    • http://diegogenna.it/userfiles/files/91360959452.pdf
    • http://eros-arena.de/eros/userfiles/file/69593618652.pdf
    • https://eurotig.ro/file/rutinaxejakusexo.pdf
    • https://brillimet.com/uploads/files/202109031838293951.pdf
    • https://clubsecurite.fr/webroot/upload/files/zakuredizu.pdf
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/83935159288.pdf
    • https://salwangurugram.com/files/sufekeguredaluze.pdf
    • http://dobre-jaja.com/Upload/file/55208556053.pdf
    • http://bright-mineral.com/uploadfile/file/2021091307001048.pdf
    • https://milliondollardesiclub.com/upload_files/featured/files/sorowojemopidavonipisaze.pdf
    • https://lifo-sea.com/ckfinder/userfiles/files/3496732968.pdf
    • https://dycmc.com/DATA/upload/files/202109011655367502.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161356de84dc7f---48530090441.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=clear+bluetooth+cache+android+10
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfbd.bin
89ff6ff34299426bbcfad0d30a648157a2b4a123c03889c55e85a547b86bf2ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBD 19096 bytes
font_01_sfnt_off00011101.bin
528f29286884b948c36a0d0258374aeb44d4e26092d795b1b94e24ec18f74892
pdf-font-stream PDF embedded font (sfnt) at offset 0x11101 10744 bytes
font_02_sfnt_off000129a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 16792 bytes