Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46bed98609524a7…

MALICIOUS

PDF

85.0 KB Created: 2021-09-23 09:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b48a1aa66800fc1f0e409f0921b48787 SHA-1: f039ac339f3b7f648b2f666725c5e515d9a384ed SHA-256: e46bed98609524a73f2e3e1b1f96c2788e4526b2fe5d295956b2d5d96c9b8a62
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of embedded JS points to T1059.007, and the overall nature of the document suggests it was likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=the+power+of+now+pdf+summary PDF link annotation
    • http://vectorma.ru/uploads/assets/file/xiwokalawomojavodu.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/66979464865.pdfIn PDF document text
    • https://phukienbep.net/media/files/samurujolot.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/dasuvadafeki.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/90658766732.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/beruwuvaj.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/56208692437.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/55952849626.pdfIn PDF document text
    • http://vce34.ru/attachments/file/nusopiwoboxi.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/79331280425.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/79f3a5dd6b55de75ecc6fc6a1ad7ea23/bukadijagopogurepenug.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/60740880199.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/toxax.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/58545172537.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/witeferubonadofam.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/36005289449.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/kelarobedera.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/kedofetomo.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/topirorelep.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/15026732639.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/vofusikizatexoniferij.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/gumipafokepisupen.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/mawidadu.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_off0000ec18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC18 16080 bytes
SHA-256: f3636ea46d28d24a9ce28b860b3440382a805481bb308b7196432ea093015c31
font_01_sfnt_off00011595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11595 10788 bytes
SHA-256: cdc64a5846f23ac96b1e9c4718c3ce25d1dd8a2ac3dcf41fe9fc929df1c75fae
font_02_sfnt_off00012e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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