Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b68c12695c7c322…

MALICIOUS

PDF

94.4 KB Created: 2021-09-02 06:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0bd1b299fe97b2e7876e1e368ea9498 SHA-1: 0d67f2b91b1a08092850303bedba73101ab28d08 SHA-256: 7b68c12695c7c3220323565ae25c541f603b4243f1824d1e901550bbfd7b61f4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites or disposable domains, suggesting a link farm designed to mislead users or for SEO manipulation. The presence of multiple external URIs and link farm heuristics indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://blissworldbeauty.com/newerac2c/userfiles/file/59131464256.pdf
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/27153135971.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/e52e7b3e04ed0149a64c4f166301ae38/jemaxaberekab.pdf
    • http://shiokuda1.com/contents//files/bijedozidoditotuboxo.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fde5a5903241e11817f94e8d45eda0fc/30487513749.pdf
    • https://dondepodemosir.com/userfiles/file/nalelegivefuzolofufuza.pdf
    • http://ankamet.com/userfiles/file/dasikatimuluvufowew.pdf
    • http://mashtalkandil.com/userfiles/file/52106079857.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/f58qb297dav7uers74jn1d2ar3/6227394474.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ac24b90ab39---fufapirakakajikud.pdf
    • http://angarakshaksecurity.com/userfiles/file/zeruf.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b32de312dd4---58684215175.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a13e65cf67---dosapalobakamiwojuradisuk.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/0vfnvq6upgerkb9qaj9gblali5/jowazepin.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/937cb17bf67cd040cb2968045cbb6866/36310595414.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/gijj7flhthk6n4o0do9d2frpum/2491769027.pdf
    • http://asfus.net/virgsurv/userfiles/file/94284709084.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee84136ba54---28234295402.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16119a4572e717---69273584533.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/l9pol6msn6bpehfjhkafpd8cv5/merotaji.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/e5gomkt7vaf17dmds9jv0gkjen/lurabirepawap.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/kdhtp78uq4glh10aahskn6agk0/17530461364.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909177be4ea---45201127709.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4f59792fa---morere.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=creative+toys+general+reading+answers
    • 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_off000109da.bin
98943f9cf3c5171b5b8a44c2ddfc41a8961c4ed074ccb1f8b6a69a74c16a4d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109DA 18728 bytes
font_01_sfnt_off00013ad6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD6 16792 bytes
font_02_sfnt_off000152ed.bin
7f720e6a25e2fd4751d4add07d276ddecfc1ac52254ff8c9094f2ddfa193a00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152ED 10720 bytes

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