Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0ca8e1a888bc7d…

MALICIOUS

PDF

75.1 KB Created: 2021-05-08 12:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13f4ab54155e423cdda0f4ff65e459dc SHA-1: 58e9e9b0668d0e9286533767661fbf362a5c922f SHA-256: 2f0ca8e1a888bc7d5c54d9c579485eff344505f7793de023ccfa42fbc9a18f00
66 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 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 0.9998

Heuristics 4

  • 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://fokemale.ru/strik?utm_term=baby+goats+for+sale+fayetteville+nc PDF link annotation
    • https://cdn.sqhk.co/wixefawoz/dddibib/56060619587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fd74827f3d2e.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/gdidKjg/rare_exports_streaming_free.pdfIn PDF document text
    • http://domsale.xyz/nebirupapipinedamiqjs34.pdfIn PDF document text
    • https://deluwibenarut.weebly.com/uploads/1/3/1/3/131382693/wadivuwifojenazik.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/mehiEIW/empresa_excursiones_para_cruceros_opiniones.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501991/normal_604b582a520c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_5fee520198d25.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/windows_10_launcher_for_android_apk_free_download5ee0a.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/f7983c461192bfd.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/lSCyuhf/space_engineers_hydrogen_engine_not_working.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/basic_swimming_techniques.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tososite.onlinewebshop.net/83532744944.pdfIn PDF document text
    • http://wekijedi.epizy.com/bhoomi_movie_song_ringtone.pdfIn PDF document text
    • http://fisazivibutaz.epizy.com/bosquejo_biblico_sobre_el_pecado.pdfIn PDF document text
    • http://sanukut.rf.gd/history_of_science_fiction_literature.pdfIn PDF document text
    • http://josesomesube.myartsonline.com/waste_management_in_the_philippines_articles.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB14 5188 bytes
SHA-256: dc07ac08f5efec4ebbe804bea9c452f7eca0e80bf55c4d116b33c2116bf1f7a6
font_01_sfnt_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 10612 bytes
SHA-256: c15298d6d3422ddb8401b0edcda66d4aebb5c9524562fd231409b99c0236aca6
font_02_sfnt_off000110f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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