Malicious PDF — malware analysis report

Static analysis result for SHA-256 416d914cc139e8d0…

MALICIOUS

PDF

279.1 KB Created: 2021-06-25 21:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a87173aaa4d152a84e377691d02f2ee SHA-1: 62b427140097ac50b3b04e5e0bcadd72f39fa5c9 SHA-256: 416d914cc139e8d0b691906685ea279d62a785ca2b9df440e418c40a60db7a87
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many of which point to compromised WordPress sites used for hosting malicious PDFs. These links are designed to trick users into downloading further malware, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9766

Heuristics 5

  • 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.
  • 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://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/buvimedoruniwogasalizulup.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/b47b816544e244e0352e6726e90612d3/29216589952.pdf
    • http://alnadaoil.com/userfiles/file/nalapemoboranolefaramanov.pdf
    • http://bestapp4u.com/admin/uploadedfiles/file/ziboloxejoba.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607892903ac50---puvalagarivepapiputojuni.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/2ace9a53fc24a5dd6fd3acd6c104e645/69546488103.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729b13db889---48591802271.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/92760156354.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/jn37km6sdfaa2r5jo9o5e37953/mikuzozevi.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/c1666190b59470bb21240820a347bcde/40574112767.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efe235c1fe---fulupib.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/jmbqovos79jnp6bva0uus7dg6j/6742445002.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/71d990a6a1191ab701ed914d7238e41b/foseledosoteze.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/3787df34b1ed78293e0d82dc29d11c4b/57818623825.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3735dc97---setenisonomoz.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/9da08c9c282a277cff55cd8b9f71b876/56569457928.pdf
    • http://shqinze.net/admin/upimg/file///fagoxa.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad59a815a62---92299382268.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/dfa4c8a7b9c9bc5007ad320d8e901400/gosama.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/djsb4juacfi47e1utl4red5ud3/55807450894.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160abff07e15b6---27208720177.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfd10b3408---najubevarazuzuzizire.pdf
    • https://myphi.biz/nbloom/fckuploads/file/deteruvaragixiko.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/18d9080bd0863990838c174ff58a6231/86873757649.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c110490f627---nijobasewigudegomoruxut.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=chapter+3+government+test+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_off0003ef57.bin
4d8294b14378eca715a086118d9449cd072abd502e317d4fcc7cbbdbd19cecfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x3EF57 17456 bytes
font_01_sfnt_off00041c90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x41C90 16792 bytes
font_02_sfnt_off000434a7.bin
045c6162cb94df0d1c5b93b73fe13b4d84c18cf8f556635c2ee12e48ca65cdf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x434A7 10916 bytes