Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5417ead36f45eef…

MALICIOUS

PDF

84.4 KB Created: 2021-09-04 01:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a5ab36cc4fa67c770f46e9f3614da52e SHA-1: ad265b15745f33eca1b629c4297254290586e1ec SHA-256: d5417ead36f45eef52e864dc6a6c82b0ad8375a58ee0b8fdc50d57c7e42bd732
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of numerous external URIs and link farm heuristics indicates a primary function of redirecting users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://synerhu.ru/uplcv?utm_term=battery+types+and+sizes+pdf PDF link annotation
    • https://saleskerala.com/ckfinder/userfiles/files/kuwimirapexegegum.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/52313013932.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d54ed6a735a---jobubolubibiroxitagil.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/zexotum.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/gisenadunibamu.pdfIn PDF document text
    • https://businesslife.com/content/file/temamaxolixitakosodomor.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/p7bkt4bo8cu7rhg1i6n9nnbtdh/51447069375.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/fajokuzulutorukojewogigo.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/d502e6bd5da1507c1e6a87108542d28c/20545962446.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/46877462529.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/18040003080.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/lunezifibafexe.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/1eih376aqddo9jj0fs5m1s75c2/gokavokogewukuzanimu.pdfIn PDF document text
    • https://businesslife.com/content/file/gimokasel.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a68c80d1e67---87102125166.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/pelijajupatuk.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/94296536751.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/rezelazegibivimolabubel.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/69721272767.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/23326803710.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/rifimujeferodezakod.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608831959bced---11685554847.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/niroxanamisofikopuvu.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/40030458587.pdfIn PDF document text
    • 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_off0000e5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EB 10552 bytes
SHA-256: 03d6ec4b01752ba0e85d53a85e06784ac8703141a84e066ef464819a47c19a9a
font_01_sfnt_off0000fe34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 17880 bytes
SHA-256: 053efcb62b0f3a05f0e16f3c8cea5e307f5a7179a145b79499a945cc067bead2

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