Malicious PDF — malware analysis report

Static analysis result for SHA-256 e914cb75644edaef…

MALICIOUS

PDF

81.8 KB Created: 2021-04-02 22:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0a467e0bd90b3490c46777fdcff3ea89 SHA-1: 6500651c7c8492b6378463c8a2cacad2ad60bad0 SHA-256: e914cb75644edaef3fddaaf5d7d29ef0ae6db64a0cc5c1402c5faea60c7ef2a3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=alcoholismo+tratamiento+farmacologico+pdf PDF link annotation
    • https://cdn.sqhk.co/vanewano/Whiohhc/green_party_michigan_ballot_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_604f05c7cbfb1.pdfIn PDF document text
    • http://rimka.xyz/what_is_a_giant_star_astronomyctjdo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_5fcb390d0a9c4.pdfIn PDF document text
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/6327558.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/e95b39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365601/normal_5ffc4dda6ab01.pdfIn PDF document text
    • https://fanedidunosav.weebly.com/uploads/1/3/5/3/135345804/9309362.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/ajfjgUh/92685862244.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/EwIoKhj/nursery_rhymes_lyrics_meanings.pdfIn PDF document text
    • https://jerolota.weebly.com/uploads/1/3/4/8/134859034/9808189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_6058a11699835.pdfIn PDF document text
    • http://neo-tp.ru/bapegazinejij2zsgr.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/gidgegc/bts_kpop_songs_lyrics.pdfIn PDF document text
    • http://tesocoin.online/download_wallpaper_samsung_s20_plusx1yjx.pdfIn PDF document text
    • http://metalllift.ru/c_graphics.h_tutorialevj0u.pdfIn PDF document text
    • https://fetazudumaveber.weebly.com/uploads/1/3/4/6/134615608/1dfd8.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/9598472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_603594fc58c00.pdfIn PDF document text
    • http://karnaval.host/sailor_moon_and_sailor_chibi_moon_transformation5xhup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e3e7a4-beae-4635-a1ab-30b2f486a22a/dinamicas_grupales_de_integracin_para_adultos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d841a6-1687-4da4-8095-c41f1f24c4ce/getobedibekibisiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6d8a08-d5fd-4486-924d-35e65ff7108f/garmin_rino_650_charging.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_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 5556 bytes
SHA-256: fe5c7e3aa3ce02fc491227d179edd2467a84e21794d35e80b5c1c33e75a2a319
font_01_sfnt_off0001102b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102B 12640 bytes
SHA-256: 5e51ee5660a179b12295d87ec931779f520a1c68e3f9deb719fa2bdbe3f060b2

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