Malicious PDF — malware analysis report

Static analysis result for SHA-256 69706c9726dce2fa…

MALICIOUS

PDF

76.5 KB Created: 2021-01-24 19:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e954e21cf95637a827309f5c1ae77e62 SHA-1: 1627118dd537e898d0de287fa53f17c9be5d6660 SHA-256: 69706c9726dce2fa96c9f75dc2332ad1dac64269c2e94d8b5b9a45793a71ec72
156 Risk Score

Malware Insights

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

The file is a PDF that has been flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, indicative of a link farm or redirection scheme. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of external URIs and a link farm heuristic points towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://seumenha.ru/123?utm_term=marylin+monroe+star PDF link annotation
    • https://cdn.sqhk.co/wupifufexix/9gfPWij/pojotukegovetazop.pdfIn PDF document text
    • http://semengergel.ru/cute_animals_cartoon_wallpaperv47xd.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/12b999d79f7d0.pdfIn PDF document text
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/9dd28841.pdfIn PDF document text
    • https://pixumoxijabana.weebly.com/uploads/1/3/4/7/134748481/b76f6be2310aee.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/g7Hgdgj/ahly_vs_zamalek_next_match.pdfIn PDF document text
    • https://lexapokugivida.weebly.com/uploads/1/3/1/8/131856754/3178031.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/gThdlpW/99461551151.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/blade_and_sword_1_full.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/gibbs_free_energy_problems_worksheet_answer_key.pdfIn PDF document text
    • http://kofujuluzode.epizy.com/nodal_analysis_with_voltage_source.pdfIn PDF document text
    • http://lenadupubop.rf.gd/61487110657.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/46825517996.pdfIn PDF document text
    • http://durunorutap.epizy.com/witodenugukeru.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/angular_file_from_url.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 4940 bytes
SHA-256: ff5da161ccdbc06ae16697164dbfe3c0a143cdaaa31d2a9a11563730531f5d47
font_01_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 10228 bytes
SHA-256: eb9e0434418aca9c0e349692c4b29b04e302bf0b28ea9724375917c6eb8a4d0c

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