Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ee103c6a5e86e7…

MALICIOUS

PDF

84.6 KB Created: 2021-09-11 18:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 6a233929303c088a7fb14a8d6d3127d5 SHA-1: bee6ba8ae5f0e37e823d57cfafc96cddabfadc53 SHA-256: d7ee103c6a5e86e7d67cd6d0f2b32dfce38c74cda252ad56da71c8b444fbf828
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

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 http://sake-tori.com/images/library/File/19088243798.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a2e46f42d---xoluvobizirudekafereb.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210906203113.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/48928464476.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323cc9eee0c---kepuxodojeluvopibide.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/78836906806.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/zapezupa.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/nolizizopa.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/85706869761.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/gipigulewokonid.pdfIn PDF document text
    • http://adbrf.com/files/fckeditor/file/127831419613cc4d9a2911.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/30769899917.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/bamegadekurejor.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/88699247130.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/mutezoje.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/guxesimokasiru.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/kabireser.pdfIn PDF document text
    • http://deltools.com/userfiles/file/tekimazos.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/tenerirudekikabam.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/zojevatapikerotefel.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/dufagenenozikaxisezaduta.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/zivadedirilavumiginiruzu.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/13990912090.pdfIn PDF document text
    • https://bloomeng.com/uploads/50723761172.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=level+up+games+for+androidPDF 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_off0000e46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46B 18304 bytes
SHA-256: 786134522d1badc934a2a110065384666e65fbc95c7a377c1349cd882d68d516
font_01_sfnt_off000113c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE0 10868 bytes
SHA-256: d50d996329cf49d20fda85fb3a045397d7f6b518f10e8fad188a28fc07062d2c

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