Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc362dbbc18260b…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 04:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 497e4fdb67fd8019fed07548c720e43a SHA-1: 7b108aac2625e1aa626c1d3a3c01ff6440de7431 SHA-256: 6fc362dbbc18260ba84aa4034dbeb9ee7b6e403f82b8d8eb1e681a61bb170961
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links aligns with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://jin-ji.com/upload/files/95950880865.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4tuhgtseo4psk9s2sii0vgoi72/72196686188.pdf
    • http://dataction.org/demo/dataction/media/wawutuzivo.pdf
    • http://bedrucken24.de/userfiles/file/84226485737.pdf
    • http://makassitools.com/userfiles/file///22226683485.pdf
    • https://facades-et-traditions.com/actualites/file/tudaweduxikorulegejomanob.pdf
    • http://15441707.com/data/board/file/20210910052048.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7ea3e5530---11723560871.pdf
    • http://facyt.com.ar/ckfinder/userfiles/files/11288455852.pdf
    • https://mps-india.com/userfiles/files/13172488950.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/d8e57632103720922cb132720ef8e245/32610092336.pdf
    • http://geoass.eu/userfiles/files/38812299503.pdf
    • http://ncfc.com.tr/ckfinder/userfiles/files/68571303953.pdf
    • http://security-m.jp/tool/images/file/9066367120.pdf
    • http://ageddfjtj.pretty-match.com/upload/files/fidomelixifubu.pdf
    • http://xedaptheduc.net/app/webroot/uploads/files/mudotunowel.pdf
    • http://baloneacessorios.com/_upload/file///pigafugilasevuvoginokuz.pdf
    • https://netiko.ge/img/Data/file/bukebewovisujakobominen.pdf
    • https://isosklo.cz/uploads/38048365999.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161356263ee39e---9844368630.pdf
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/rufabubasoposakokob.pdf
    • http://lycee-elm.com/userfiles/file/73539654848.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16140297dc5db2---soxodemoradebubibi.pdf
    • http://auto4-spb.ru/public/images/ckfinder/files/xuverozamutojofefirotaxew.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+can+you+tell+if+someone+viewed+your+instagram
    • 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_off0000dc2b.bin
7c3bc7df51c2b583e3a7cbfa59c65f0a4c4e0b43fc1e85bd8e4dc9c0949bfc5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2B 18248 bytes
font_01_sfnt_off00010b0b.bin
183c3e43fa540734dd843e4a46012396dd8785b9ab204c8053ddda514b65914a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0B 11176 bytes
font_02_sfnt_off000124ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124FF 16792 bytes