Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bc232878a40ca0…

MALICIOUS

PDF

83.1 KB Created: 2021-07-08 14:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5d3b2a0472d7ad64652d513bb0e36e8 SHA-1: 894efe51b3381d5afe4813270bd7b9c544f25207 SHA-256: 09bc232878a40ca06a03d6ec242f424e831f52c3fc37bc502abef3fc13505b2c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcadb92265f---63627486467.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e9c1f9c3bcf8b07f0f7e884e4aaaf74b/tejediveguvakinalip.pdf
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60839706927.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc91775cf7b---sonaxediganuzid.pdf
    • http://biotop-zamosc.pl/userfiles/file/41009758821.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/s2o20169upqqe8lvtnmbfhnus0/77780089358.pdf
    • http://technocom.pl/editor/file/54416110419.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/ba073a4afa68d61f22d543cc8dc0a868/diwiguve.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077846b820e6---zurapawenewexokepomutakux.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/9e13344f0558da9a629c2807b79baaf4/levukuwototulivuvetuge.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6itu8hhuqms9ops69aou0bmq91/98180698748.pdf
    • http://anaminfo.com/attachfile/file/75383556443.pdf
    • http://szkolaprywatnaleszno.pl/userfiles/file/jopopikadatejojibop.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c555ecef9---60324066873.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/edb925ab97f74d229eb205bf7121eba1/wavawuso.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/6d3429fb55333a466432bcf3f63fa8b8/nefulegexeburudivasibab.pdf
    • https://bnovum.hu/downloads/94277014342.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afa425cb5ee---58989534346.pdf
    • http://yishiweb.com/upfiles/files/20210702_014223.pdf
    • http://119hero.kr/userData/board/file/99714003549.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6faf727bee---73849569772.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e14df261d---71856135525.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/c4622852ec0147ded4a59e37d1632c04/jajudugivapogiwotubi.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/15578235932.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/f334249434f7f120c1d882c49407ccbd/wumawowotisenavodazune.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=find+the+volume+of+a+sphere+calculator
    • 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_off0000deb8.bin
a7bfa3209ba6d54ee0608b93bc3b176e21fb959f3e59f9801bbc219dcfa1f5fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 11028 bytes
font_01_sfnt_off0000f822.bin
7f8f64c71eee943f8a20fe5308deee64cc8c7e65cd9a297a1e5a238724aaac8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 17652 bytes
font_02_sfnt_off000126e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126E6 16792 bytes