Malicious PDF — malware analysis report

Static analysis result for SHA-256 068ea88406bdfcdd…

MALICIOUS

PDF

77.0 KB Created: 2021-04-15 23:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d4a06cd057e477a2c6b98689fab1058a SHA-1: 11ca98e5e332d282e2c2a96711bb46a7bef954e1 SHA-256: 068ea88406bdfcdd5843bb32aabcd56a3faa76b8627d59ab9c537343ddb8f7b1
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 0.9956

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://resalured.ru/strik?utm_term=what+does+an+ode+to+something+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479235/normal_5fe6baf2edb39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_6061f01e9b6fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_60544fa9d2d52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_603ae63260c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_6047edb58cdb1.pdfIn PDF document text
    • http://ninovudizuliku.iblogger.org/domugoguxowenezura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_604d7d322f0a5.pdfIn PDF document text
    • http://yesitalia.fun/faulty_product_reportcoc8o.pdfIn PDF document text
    • http://hot-money.fun/sumefasevozapululudiduewg8e.pdfIn PDF document text
    • http://auth02mobility.com/skies_of_arcadia_manualntv4i.pdfIn PDF document text
    • http://mafewagidimu.22web.org/12217622017.pdfIn PDF document text
    • http://alcexpress1.xyz/jisevubu70uc.pdfIn PDF document text
    • http://freehookup.xyz/nfl_fantasy_football_injury_report7zdm8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496001/normal_601c7b022e329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448535/normal_6002038305ae5.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/viwoxuz/99065456945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcca37f3-860d-4dbc-bf63-5949699ea853/24400758451.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/ms_publisher_2019_calendar_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/chogada_tara_audio_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7574bcd-b5ca-4bcc-82c3-2f35cdcd7d95/41454524593.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/taco_bell_menu_2020_with_prices_and_pictures.pdfIn PDF document text
    • http://gavapesofu.epizy.com/zedaduzexadevinujek.pdfIn PDF document text
    • http://xofunuxemijowex.rf.gd/mijodejupo.pdfIn PDF document text
    • http://topuwagib.epizy.com/balancing_equations_practice_worksheet_answer_key_chemfiesta.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/abbyy_gz_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7da044a-2bf1-45b9-96cf-b6471b4bbccb/the_secret_garden_book_summary.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_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 5124 bytes
SHA-256: b7539838606a3c94cf6ad596568ccc69edc27708d1bb7c97e113860956ff8576
font_01_sfnt_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 12360 bytes
SHA-256: 197053e7db0dbf178ec61dbd1a4e1697194a6bf58a55d42faa61ae48aa06f6ad

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