Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcc400ed79e0b0d…

MALICIOUS

PDF

76.7 KB Created: 2021-03-02 17:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 563ce9c2db4a431afdadbf1fd92f61c1 SHA-1: 90367b04663162f779da70cfc1fe85f27a1fe958 SHA-256: fdcc400ed79e0b0d3c5c37877cd9795164b6cf206755ad0649ab12f923cebb52
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The presence of a download button lure and a critical ClamAV detection for Pdf.Phishing.Trojan further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a potential for delivering malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=persona+3+fes+emulator
    • https://cdn.sqhk.co/zotipimesaza/7jjegeC/rozevowazusatemusafon.pdf
    • https://gugamuwapubadek.weebly.com/uploads/1/3/0/7/130740318/919979.pdf
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/segepo.pdf
    • https://cdn.sqhk.co/xezufulozuwo/ia8iehb/leather_skater_skirt_forever_21.pdf
    • https://cdn.sqhk.co/loxosefivipo/9Mv9z4P/temarevu.pdf
    • https://cdn.sqhk.co/tenalewi/iiUvgdU/nalukotakevujeg.pdf
    • https://cdn.sqhk.co/dujagazatad/ojfJDia/78098957492.pdf
    • https://cdn.sqhk.co/wemitupu/jdgdChS/intro_to_business_process_management_ppt.pdf
    • https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/df2a1e.pdf
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/gomosopabix.pdf
    • http://clipshd.design/80316900903urawb.pdf
    • https://cdn.sqhk.co/linidivez/Jvhahdm/jogagitigiguro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xakagigoneliv.myartsonline.com/lds_2021_youth_theme.pdf
    • http://totuxivez.onlinewebshop.net/9884407754.pdf
    • http://nonavijewiw.epizy.com/51579473222.pdf
    • http://nalakakowim.epizy.com/50496042302.pdf
    • http://zapofekeba.rf.gd/8124437099.pdf
    • http://novutizaxerujik.epizy.com/viper_alarm_7752v_valet_mode.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea6.bin
71c549e7b88b1f28f1022698ebf6fc5f3820ff00c7c4f4aeec75de4ce91b3568		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 5076 bytes
font_01_sfnt_off0000ffd5.bin
d114beb19da27af46b559c047dbd12a87a13782eaa8bc712364953a0c188a823		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 10572 bytes

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