Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e6b80660f171b4…

MALICIOUS

PDF

75.4 KB Created: 2021-04-05 12:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2080d829a71d25c1a3cc22e794540937 SHA-1: d66a8d22d59d340a8101edcda4c33eca63f6bafb SHA-256: 22e6b80660f171b44f3a71a60b7e79a90607c0f23285c61084301bc177914185
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a phishing or scam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs likely lead to malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=how+to+become+a+certified+data+analyst
    • http://fovijivil.iblogger.org/55988255023.pdf
    • https://cdn.sqhk.co/tinulafi/jbXgigd/gacha_life_studio_wallpaper_hd_2021.pdf
    • https://cdn.sqhk.co/lokalofobox/vymibgi/12344920148.pdf
    • https://cdn.sqhk.co/vizebika/dgfBBhj/b-_form_dna_double_helix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavugusepe/capability_statement.pdf
    • https://s3.amazonaws.com/lokijuronig/15659410231.pdf
    • https://s3.amazonaws.com/rawesaragegugar/cerere_demisie_2018.pdf
    • https://s3.amazonaws.com/mikibetiv/feedback_after_trip_form.pdf
    • https://s3.amazonaws.com/navoburarovada/27267780355.pdf
    • https://s3.amazonaws.com/bovenotojitowe/what_is_samuel_beckett_famous_for.pdf
    • http://wikimenuvebiz.epizy.com/33919755652.pdf
    • https://s3.amazonaws.com/zuwosil/rifinuworonajolaxisajagis.pdf
    • https://s3.amazonaws.com/degagaziv/guided_reading_lesson_plan_template_1st_grade.pdf
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_c11dfa51716d4eba844b9af3972c5d3f.pdf?index=true
    • https://s3.amazonaws.com/murudute/white_as_a_sheet_synonym.pdf
    • https://s3.amazonaws.com/fukepez/jadopubofirosanomule.pdf
    • https://s3.amazonaws.com/nademopor/bu_online_registration_form_2019.pdf
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_1aaf6db9e76e4bf6a1cd48114e408076.pdf?index=true
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_d382a56027cd4ea89b418d8424a23aab.pdf?index=true
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_2df6c9db08f94074bb7e6d00f5e11933.pdf?index=true
    • 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_off0000e8ff.bin
0c806dee049204cbf3d4573556dbe6f4bb109c7ad186a326eeaa493adc54f99f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5460 bytes
font_01_sfnt_off0000fb8c.bin
228c436fef25b7131865dc7590cc9d7883a3655fc3c9f365271fe83a16bcfb23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 10712 bytes

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