Malicious PDF — malware analysis report

Static analysis result for SHA-256 664737dcfb811f47…

MALICIOUS

PDF

116.1 KB Created: 2021-07-01 11:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8ebeab8c5972c8c8d0eb615a6e0a76a SHA-1: e272b201849cf239937f15f2d29fb8273e280003 SHA-256: 664737dcfb811f4710ad8de816e01b1e1462bc2e615b7bd0041c2bbb71c0bffd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attack pattern involving user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://drafthe.ru/uplcv?utm_term=genetic+recombination+transduction
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/5d247ec434f5b0b6acf64855a9b9827d/76880876512.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b13bda58a---50232427477.pdf
    • https://perfecthospital.net/FCKeditor/file/nexopolugitoboxo.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073208042a17---pudekasor.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/16f7cfe7148637baa35da551edccdf6d/20352064404.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/024a1spbrb42m0d5ffgg9ogkjp/dunonadurap.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/8q2pkabni3m718gqnm67dbs2p8/56032026836.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ebu9qo572e9ourllijj25s5is4/natiwufosuledisupi.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/sh55i1bmg7fdm5pn37clioptq2/gawefabavopaxumu.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27ddb77fac---sumutebeleriw.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/1ec798d77a46ac76e6762c296698e07f/80945418376.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cde850ae92c---kafidireja.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/88937728021.pdf
    • https://aashianarealty.com/file/94675520315.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qf1gr74t5cvq2l0nn2jahgj414/52490514314.pdf
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/8nq5cgarjh2drvbnfrg9jduli3/gexixufol.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816e2e7bb09---52446257925.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f18177e6b6566d83ef2af97fe1155215/23714866846.pdf
    • http://www.allatpatikapecs.hu/images/file/23114653282.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/5bda50d765c580a92d7e9bcf3b172aad/fugizavoxoja.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771a6f4b39a---pelozixopisesi.pdf
    • http://utuin.net/files/fckeditor/file/vasuwofabusoxusamizifisaw.pdf
    • 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_off000163cb.bin
c8e02ac42143a4dc26f2e5910d998ee39f3679994d1150438fa4a02280660190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163CB 17968 bytes
font_01_sfnt_off0001921d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1921D 16792 bytes
font_02_sfnt_off0001aa34.bin
7ff0fef4c0d8a71168a557ba31a87e9b8f45cbc38ce86a99248611c743583b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA34 10764 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.