Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cda5e79f04dbecf…

MALICIOUS

PDF

79.3 KB Created: 2021-03-17 01:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7b4704ff70210a32676c32eac2bfb7ca SHA-1: 98645ca6d8391eefd7676e9b5e72bcc72fac81b4 SHA-256: 5cda5e79f04dbecfb63ec6f1eda14cc04f1b361a3bf88fda3dfa1498b2b7c6fd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://dafemum.ru/123?utm_term=lessons+learned+project+management+template PDF link annotation
    • http://accface.in/informao_nutricional_abobora_cabotiar0v1p.pdfIn PDF document text
    • http://stankoff.org/house_of_commons_guide_to_laying_papersvu7ec.pdfIn PDF document text
    • http://my-favshopf.online/dark_tower_series_in_reading_orderz15yk.pdfIn PDF document text
    • https://cdn.sqhk.co/jodariwem/jaCiiii/agar._io_hack_games.pdfIn PDF document text
    • http://love-cosmetics.shop/29565376080szzzg.pdfIn PDF document text
    • http://carinsusa.info/emiway_songs_videod9gff.pdfIn PDF document text
    • http://bitcoins-profits.com/lixujo01357.pdfIn PDF document text
    • http://stassikorskyi.com/garozadibefoamgmt.pdfIn PDF document text
    • http://ejqy.com/6969866779pdaxl.pdfIn PDF document text
    • https://cdn.sqhk.co/vebudirepo/hiUhaeT/popekirinelosuvutom.pdfIn PDF document text
    • http://stankovit.ru/21866839748gjopx.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/dazawojob/tizevidelivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1788b6-d625-4e2a-869d-8a114cb73d14/94498944352.pdfIn PDF document text
    • https://2fe0a9f4-4d23-48c4-8711-d5fb25093877.filesusr.com/ugd/683a75_ab11bdedf69240e29a3d0ee879c22434.pdf?index=trueIn PDF document text
    • https://adc67df4-9ac4-4169-8225-f8d60376216a.filesusr.com/ugd/a1c2c7_4c44869328bb4c1db92785d47497e8a9.pdf?index=trueIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_5fe1abd49dd243cdb80dd180167da143.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/70534662745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39226eb2-f1e8-418b-a79d-bb2959eaee5d/what_is_life_all_about_bible.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_7f569199ea1d44d9b4c3178d996a63c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2478f2-18b5-4fba-885d-51089dd596ff/23595445470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c27bf2-6d01-484f-8354-6d8a1de6c33b/zukakixeromugumasuz.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_off0000f9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C4 5412 bytes
SHA-256: 8ca6dc7dd21d3388ed9f1493866fc10b4e5e38139d96a7c9aa502b364b8d5df6
font_01_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 10528 bytes
SHA-256: f5e285906dc26aff846b30ffa3114495e277d6b75631cfeeddb1a4237fef7488

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