Malicious PDF — malware analysis report

Static analysis result for SHA-256 304a21f65f294793…

MALICIOUS

PDF

77.6 KB Created: 2021-06-27 07:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b702507be5661003f86c72f96f61a313 SHA-1: ea6dcf9b0bf473919e386bdc27ca3bd4a2855767 SHA-256: 304a21f65f294793b2c185291e8448d6eb21f5a85f44a16fc0339c56e2019106
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of embedded URLs and the link farm structure points to an attempt to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f517f9fef989d13509192af78b73eeca/jepedikurixozojuw.pdf In PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/2a4fa0c1e7ddd4c42aff85325a0353bf/vinim.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da0f7247b7---xoparefadikusaz.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/xokobiwejusuro.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/db56c77de721845e845c907efdd9d638/78555235148.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/750246fdc5ec870d00d26d3626d99a04/pimaxosuwidikux.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/c3e4amvsdo21odvkoc9nbr40op/59505775573.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/f2f6a16e252866078ae6a63c78fbe653/nexekulav.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/38555076907.pdfIn PDF document text
    • http://markone-tools.com/upload/files/mozibevepilukawup.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/4d25e49155b1fd4b02377f49bcff851f/bujaxoku.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080eb8426960---rumedipop.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/gu0q66lfajmf1sh2qmtekbpn8a/xavak.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106192058.pdfIn PDF document text
    • http://chapelguild.com/images/usr/91379281225.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/kawatitanib.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d189ba1a61---mufilinepakekuruzujix.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf9449916f---6169117671.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/16281479352.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/nigijasoto.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160859cb6d38a5---vosunoganasomi.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608268bbd5b89---92560490307.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/72185423cc6fcd9fff37c869158ae9f0/4339923430.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/a22b92c433cde2c740c789e4b506dac2/desag.pdfIn PDF document text
    • http://tele-video.ru/upload/files/fonusamigemidusuvajixuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gameguardian+no+root+parallel+spacePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADB 17056 bytes
SHA-256: a7de772f7e78da317909e79b99b177458da458bb672b474146c80fb2ad4c2427
font_01_sfnt_off0000f784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF784 10996 bytes
SHA-256: 15c124d91e0bc89ef4ac3bc24bb6bbdc9d81e1cd851d2fd7e86eae4ae7070377
font_02_sfnt_off000110db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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