Malicious PDF — malware analysis report

Static analysis result for SHA-256 e470f9d0869d3ee3…

MALICIOUS

PDF

78.4 KB Created: 2021-09-20 23:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a328ef0c94c0c65cd46948423000972 SHA-1: 65203e6da7eb2cf46f5851e39c484b5c15c89c74 SHA-256: e470f9d0869d3ee3bd5b09030412795c2f87d70c765f4e98033fa659261d94bc
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable hosting domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous unknown URLs suggests an attempt to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://big-affaires.com/img/pics/files/tuforigunizowe.pdf
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31026872547.pdf
    • https://bakwanudang.com/contents/files/54268467444.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2115d034c---19716908367.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16144939fce141---tozemari.pdf
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/budozokaje.pdf
    • https://sherwoodchamber.org/ckfinder/userfiles/files/derogukew.pdf
    • https://afgventuregroup.com/cfiles/file/60377448603.pdf
    • http://jj-metals.com/userfiles/file/2021090716451373499.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f326abc458---ruruvozudib.pdf
    • https://pragatitic.org/ckfinder/userfiles/files/nopirejupuze.pdf
    • http://helloslow.com/data/userfiles/files/44654220042.pdf
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2960512837.pdf
    • https://bushregenerators.net/userfiles/files/49081257989.pdf
    • http://teakdeck.pl/files/file/53115456545.pdf
    • http://studio5r.com/userfiles/files/jutozerebuvewewot.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613556f53470e---jexikukarezekugilo.pdf
    • http://imhome-listings.com/userfiles/files/62689746227.pdf
    • https://alihuata.com/userfiles/file/paluruvakunu.pdf
    • http://xinchenfast.com/upload/file/papugoxotexadura.pdf
    • https://holcom-wd.holcom.vn/webroot/img/files/gotogoxerupusub.pdf
    • http://webmba.fr/client/logo/file/nomijofirovisage.pdf
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/nugar.pdf
    • http://yuhao-tech.com/userfiles/file/55596190857.pdf
    • https://huanghecables.com/d/files/26455116298.pdf
    • http://resortvillairene.it/userfiles/files/vazonugujibipawu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=tubebuddy+pro+apk+download
    • 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_off0000d05e.bin
f7c84bd84b48877114d7f1b2e8128a09227394a9068d8ca4ee46ff17cf66cea0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD05E 16792 bytes
font_01_sfnt_off0000fbd1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 16792 bytes
font_02_sfnt_off000113e8.bin
8f14821678fee52a83f9af3ee2096fc3a98d6b8070faff09b007797264b21b2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x113E8 10524 bytes