Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9c481aba05bef1…

MALICIOUS

PDF

79.4 KB Created: 2021-04-07 14:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c6ffd5bc7bc8d5d1d521aa7309aba52 SHA-1: 35a19363da7b5e3ecaaf517d279094787f2cbff2 SHA-256: 0e9c481aba05bef122465b9dfdabff9bea37a4fca0c91e990f0eb7eb7b9e0ef9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The primary embedded URL, 'https://botokaw.ru/wix?keyword=bath+and+body+works+tracking+uae', is likely used to direct users to phishing or malware distribution sites. No scripts were extracted, but the extensive link farm and high ML score indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=bath+and+body+works+tracking+uae
    • https://kanumipiga.weebly.com/uploads/1/3/5/3/135346224/nipupolomobuz.pdf
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/2835346.pdf
    • https://zoparimunafixi.weebly.com/uploads/1/3/4/3/134336740/kaxanijapuf_sisupes_lasomowisola.pdf
    • http://nomanodix.iblogger.org/18969696532.pdf
    • https://nibawomufexax.weebly.com/uploads/1/3/4/3/134371272/1a37c9297b19b.pdf
    • https://bogezemobazuv.weebly.com/uploads/1/3/1/8/131856224/pipisumegunepo.pdf
    • https://debozapo.weebly.com/uploads/1/3/1/1/131164198/pokenibudibidit.pdf
    • https://xixusumer.weebly.com/uploads/1/3/0/8/130814933/9c4f66.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jeponowon/teori_ekonomi_marxisme.pdf
    • http://wibumumodudofud.epizy.com/atoms_and_elements_worksheet.pdf
    • https://s3.amazonaws.com/figugipopar/ieee_template_article.pdf
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_ef78eae8f3344d029d1e923f6cd501bf.pdf?index=true
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_9efc9f53b3324c96a050267bc327dd3f.pdf?index=true
    • https://s3.amazonaws.com/vabedafozo/30299591437.pdf
    • https://s3.amazonaws.com/fekaduvopigab/84619428155.pdf
    • https://s3.amazonaws.com/jijumupade/7526894435.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/kiroxudetejitovifete.pdf
    • https://s3.amazonaws.com/ponivotigegepub/toshiba_32c110u_remote.pdf
    • https://s3.amazonaws.com/lerezazo/kulegovaripexu.pdf
    • http://rifufogasuser.rf.gd/46530353489.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddca.bin
c5743919118b01a6ede7fb4c38c3bbe2f4341ccb9fd597dbf32ceeeb4ee48802		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 5616 bytes
font_01_sfnt_off0000f0f2.bin
b990d494130d3cb2e4c439c2d51d12a6252284ca086ecabc120047e072f6f9fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 11924 bytes
font_02_sfnt_off00011941.bin
5e3ccf0ccbac5f5c504770c2eed16435832af85e8fcf9b4ea505c4d68eebf2ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11941 16568 bytes

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