Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2de4d866d52efa1…

MALICIOUS

PDF

70.5 KB Created: 2021-04-04 18:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 80b624c9d3212bd172c6da371a766f2e SHA-1: 822f4be206921768fcc4ef2f8eecfbc162fb4e4b SHA-256: d2de4d866d52efa16d3fb6cede7485b5186e0296a3be77b67584dd8478b32820
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mezovuduw.ru/strik?utm_term=essential+grammar+in+use+spanish+edition+4th+edition+pdf+gratis PDF link annotation
    • http://waneboto.66ghz.com/my_talking_angela_hack_games.pdfIn PDF document text
    • https://waguxezemi.weebly.com/uploads/1/3/4/7/134703223/3608443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451205/normal_5fec2a3e5d50f.pdfIn PDF document text
    • https://wijununag.weebly.com/uploads/1/3/1/4/131438003/buxupite-mapawukako-rosefin.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/zosinuno_loxeler_bediboxov.pdfIn PDF document text
    • http://gavixed.iblogger.org/apprendre_python.pdfIn PDF document text
    • http://vexasemigema.iblogger.org/salary_increase_request_letter_template_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_6030dbca69cf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futezazunup.rf.gd/google_self_driving_car.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/ponuwavikaberedibasiso.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/aix_unix_commands_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/20290568829.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/92863866678.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/orbit_irrigation_valve_leaking.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/44686606692.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/43594973617.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/lagu_celengan_rindu_fiersa_besari_matikiri.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/67605261419.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/take_the_stairs_rory_vaden_summary.pdfIn PDF document text
    • http://bunisanabasa.epizy.com/dulce_maria_loynaz_poemas_sin_nombre.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/vejabe.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/gusion_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/zepawoma.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/nusoxizewasibivipemeta.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/gangster_movie_movies_counter.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_off0000d222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD222 5500 bytes
SHA-256: 0dcb34dc07d99273447460d0aa42318989ed764f28a8396422a9dbf08d8619c2
font_01_sfnt_off0000e4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B8 11328 bytes
SHA-256: 839375c3c0859fcaed004dacfd3f6cfd1e1d51342b67e3677e3cf10f56ebfe18

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