Malicious PDF — malware analysis report

Static analysis result for SHA-256 d208edd3b7902c71…

MALICIOUS

PDF

67.9 KB Created: 2021-03-05 15:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 48fd9e6e1c79981c7cdd0a3313b5e2fc SHA-1: fa8baae74d35ac364631a4b95ea6d11ca13be5c7 SHA-256: d208edd3b7902c71952cf6d1b075f05a7eaa2c6f213d0e24492803c0b77efd0b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'xajibur.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to an 'anticipation guide'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://xajibur.ru/wix?keyword=oedipus+rex+anticipation+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489595/normal_602775225be6d.pdfIn PDF document text
    • http://dipukud.iblogger.org/artisan_1430_wifi_connection.pdfIn PDF document text
    • http://streamsweets.com/wilderness_first_aid_handbook97utk.pdfIn PDF document text
    • http://tudovawo.22web.org/xewofadigi.pdfIn PDF document text
    • http://jukekelexoseda.22web.org/rategizonasadixegikune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_5fd68bc0c1d0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415754/normal_5fecc9c74e072.pdfIn PDF document text
    • http://trudogoliya.online/22713037437u2561.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404103/normal_5ff87abbe6ca5.pdfIn PDF document text
    • http://taher-tcac.com/86458878744fk2iy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489415/normal_5fee4911bdeae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452206/normal_60344b433c357.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_c729365394b24150936e6b8181bcfbf9.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_d0c3bdb5d9594ba0a3f4a22c4797fdab.pdf?index=trueIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_fc49097c4c604786ae55ccdbc322e7a9.pdf?index=trueIn PDF document text
    • http://befadiw.rf.gd/how_to_reset_bunn_slush_machine.pdfIn PDF document text
    • http://jizonizop.rf.gd/tipikixisiwivul.pdfIn PDF document text
    • http://saxuwomepeboke.epizy.com/18881818944.pdfIn PDF document text
    • http://nasakitubaribud.rf.gd/game_center_android_clash_royale.pdfIn PDF document text
    • http://dotenax.rf.gd/33445791584.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_8f48e3e563d14aadb7feecaf7f8debef.pdf?index=trueIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_c4616f183d0946539e3a80f268639832.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7F 5304 bytes
SHA-256: 717133c31fedd50ea576cca11de30255e23218305b364ef22a52baacd37be975
font_01_sfnt_off0000df98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF98 10424 bytes
SHA-256: ae0b91b90e5d30e5986d5fe97404e5529c4c94863ab62e77e2f982256234c3f2

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