Malicious PDF — malware analysis report

Static analysis result for SHA-256 215438ce01df87ca…

MALICIOUS

PDF

70.9 KB Created: 2021-09-27 16:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f916a645f2768b844508699cc753ddf8 SHA-1: 12a3937cf58ebc00a2008d44bece7d593bb64203 SHA-256: 215438ce01df87ca5d489b103898343f66d53188406aa914132f94a791c1b11d
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of compromised CMS upload links further supports the malicious nature of the hosted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://krisoc.ru/uplcv?utm_term=ravensword+shadowlands+mod PDF link annotation
    • https://mirrorlink.com/public/files/files/lizex.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/modiwofisuwugurukojas.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/denunixi.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210903_58F32AF5D8F58CA4.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1613667ff120b1---17841880504.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/basibukasegiwapetaxeji.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/14667898877.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/guxomaruroturovabutu.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/lefaxulufibutisinijez.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141291987d82---73130168420.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/17533865506.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/34193931175.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/49092464906.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/xitumufejudaxaturajagaxaf.pdfIn PDF document text
    • http://stisk.com/file/lidonazutufagabesi.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408da964798---76753328380.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/kimuxab.pdfIn PDF document text
    • https://www.anoregmt.org.br/ckeditor/ckfinder/userfiles/files/xexurugakotogos.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/kufazetejopoguxufafatij.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/webex.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/47916371950.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/morojoselir.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/tukesisodomuniji.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/pozoxexiziroponifokan.pdfIn PDF document text
    • http://pronobile.com/catalog/file/bagudal.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_off0000b2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB04 16620 bytes
SHA-256: 82a0ea7d528c04ce836c518791d0eccdd82ae06fc35a5ca4a2589a3529f6f2c2
font_02_sfnt_off0000f616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF616 10520 bytes
SHA-256: 40f85c92d0d19b82bf15d6026b0a64d57952775d126ea8111cb32bc4f1916954

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