Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb35095bca4cd76…

MALICIOUS

PDF

76.3 KB Created: 2021-03-09 18:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7be964afbd84bd660ef2fe93bca61fb1 SHA-1: 2acba6070ea1ad74067065ec5750d491c4bba5c7 SHA-256: bbb35095bca4cd768d83cb58149ab6df54d55570bc5e3cc0444cc022a0b8fe3b
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 0.9995

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 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://baarspo.ru/award?keyword=makalah+hernia+inguinalis+pdf PDF link annotation
    • http://meetsucre.pro/xewinebisirokobujegag7ovr2.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/mimekulezud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5ff9dfa68e2e5.pdfIn PDF document text
    • http://xtrading.buzz/how_to_learn_agile_methodologyg8nrc.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/Tgjgehc/send_files_to_tv_linux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_6020fc0ce8509.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/nikon_d5100_brand_new_price.pdfIn PDF document text
    • https://cdn.sqhk.co/jegivoziba/gfjfary/surarumitubab.pdfIn PDF document text
    • http://edevletorg.com/savenixfyj9.pdfIn PDF document text
    • https://cdn.sqhk.co/bepeguvovori/hgjjidH/amazon_prime_video_new_movies_to_rent.pdfIn PDF document text
    • http://stonersfranchise.com/dolusuzepekegide9fso8.pdfIn PDF document text
    • http://bachanalytics.com/usps_tracking_number_format_internationalfhopx.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/648c0984-d770-411b-b96d-965ba53520db/15570084759.pdfIn PDF document text
    • http://girofili.myartsonline.com/half_magic_book_series_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0615cff7-2de1-4939-a7ab-a2fa09743332/liwokirumetidenudanuribos.pdfIn PDF document text
    • http://pujumek.myartsonline.com/citizen_eco_drive_movement_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09118854-0da6-40e9-8b0d-e7478fba3282/miracle_morning_movie_watch.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_d41cab073c81446289da92d34d80c293.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_d60b047d984f4f40af71de1982df285d.pdf?index=trueIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_6c2acf091edf48eaa7ef7cbe18cc1dc3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1980c29-d70a-4f07-8419-c33c1ae06531/how_to_prepare_for_interview_at_amazon.pdfIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_c1fdf7f8c2334478b24c4c00ff7f31c8.pdf?index=trueIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_45765018a3ac4fb3a92cbd7cc7de340e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/370598ab-8bfb-496a-bf8d-761644bd80af/warcry_slaves_to_darkness_army.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39F 5372 bytes
SHA-256: 29639e3bfedcb100343538a2d3a22ef620548cd8669a23ad4e386249a03b09f2
font_01_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 10276 bytes
SHA-256: 8f570f8507bde38574bfeec6348856ccacb1bc0475c98cdd08956dfbba83d878

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