Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf361ccb7f48d85c…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 04:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 72105d4e3a25de7244fa4d31c2b117f1 SHA-1: 9d0dfef4f4baed778b6bbfbcbdf402a64006e7b9 SHA-256: cf361ccb7f48d85cbb851925f75a5fa3fb8cf9c065867b2624a7a35bc9a3ce83
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-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://jumiwimov.ru/123?utm_term=absorbent+bath+sheets PDF link annotation
    • http://xiravudes.22web.org/animal_farm_chapter_1-5_analysis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_6042a6c254f95.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/zuzowuli.pdfIn PDF document text
    • https://kuxifegofemiza.weebly.com/uploads/1/3/4/8/134865321/9372177.pdfIn PDF document text
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/besijisepawevup.pdfIn PDF document text
    • http://gufutaca3.xyz/arduino_1._6._54zab1.pdfIn PDF document text
    • http://rukozhop-guide.com/estructura_del_texto_descriptivov73h9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465685/normal_5fde06c44bd30.pdfIn PDF document text
    • http://electorat.org/wewotilejalheggt.pdfIn PDF document text
    • https://sevirisedug.weebly.com/uploads/1/3/6/0/136089940/ruduxujisukad-kotetape.pdfIn PDF document text
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/4469cffabc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_60482407b66d2.pdfIn PDF document text
    • http://apparentlyopt.com/dyson_v7_animal_cordless_vacuum_cleaner_replacement_batteryukp7n.pdfIn PDF document text
    • http://sufinamek.iblogger.org/hunter_x_hunter_2011_episode_guide.pdfIn PDF document text
    • http://meetchambre.xyz/nom_aditivos_alimentarios2i3um.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://fosixokosed.rf.gd/gedisamamomupi.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/hp_deskjet_3050_printer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/vufijurelazasim.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/64939559899.pdfIn PDF document text
    • http://pidegesuwi.epizy.com/tatefiledimilik.pdfIn PDF document text
    • http://dibesenowox.epizy.com/58915033879.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/beeruva_video_songs_free.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_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 4612 bytes
SHA-256: c8ae01cf873af54cd77b6442dcf12ef16f06cc73267746de75cc8566ce5b7718
font_01_sfnt_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 10564 bytes
SHA-256: 98f1ac88032e2f11b366b3fd8c93d035820fb3e3d498c8690a83b3310fb5d340
font_02_sfnt_off000121c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C6 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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