Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dbb570885b2595…

MALICIOUS

PDF

82.3 KB Created: 2021-09-21 20:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5ed00d500770d2996676c383c412865a SHA-1: c804ba8c71b2c14732541fdac8791559ee7895ee SHA-256: 10dbb570885b2595bfafce0dc6656200e8f131f5a71efe81568d897c375e2c4e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. The presence of embedded JavaScript points to potential exploitation or redirection capabilities within the document itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=paper+app+apk PDF link annotation
    • https://accuratesearch.com/userfiles/file/togotovisurarem.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85244270245.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/nuraketimamanomar.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/guziwopijuf.pdfIn PDF document text
    • http://zgic.ru/!upload/files/38995229377.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/89341703871.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/52193133473.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/zeguduzekijewidazo.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/sozexivotoxexex.pdfIn PDF document text
    • http://domkomplekt34.ru/attachments/file/83333674556.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/voxewadotodixojofelad.pdfIn PDF document text
    • http://canadianrockies.info/files/file/jazulavepan.pdfIn PDF document text
    • http://nhakhoauytinhaiphong.com/upload/files/67822388529.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce6dfe7004---gotepiwoziseruxuk.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16131a44e91fbb---titaxufonatanatomigo.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/fevokupofokepurelog.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/79061353181.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/ranozuporudojagu.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/wuririsatesesogogogimibe.pdfIn PDF document text
    • http://scro.ru/pic/file/14452268007.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210901170048_uljr4d.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/16859845646.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/89659868523.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/xoxaxorepimulibu.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/silekuxosuxilajobalomadak.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_off0000e1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D4 17024 bytes
SHA-256: d18335f9488073556b7d8afb60de4b19d3a53b88d8d99ef899bd7ce649eb9383
font_01_sfnt_off00010e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E29 9712 bytes
SHA-256: 36d700dade85ad49ca1f06495f4d188aa45999c908167948556a4f49ae7eb02e
font_02_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1