Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff2ad9d9d3c0c12…

MALICIOUS

PDF

82.0 KB Created: 2021-04-04 08:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09c6fa1b39ce8f4575391d9d90d271d6 SHA-1: a9aa9beba957b0b39f11a5b0831fd767565248af SHA-256: cff2ad9d9d3c0c12560f967f59dea770bb0b659c5e8d5dafb4f6efd9683efbb1
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 0.9992

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://xajibur.ru/wix?keyword=pathfinder+spider+race PDF link annotation
    • http://valuburikodajad.medianewsonline.com/corredores_ecolgicos.pdfIn PDF document text
    • https://cdn.sqhk.co/noluxokeruma/3oPjbjc/the_vikings_season_6_episode_10_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/jxpjb8h/29463468211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5fedad3f6b6c6.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/the_battle_of_the_labyrinth_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/coUhijc/nupuwavinigeroz.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/ab_blood_type_diet_meal_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/gidgegc/bts_kpop_songs_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/iajiLmj/42149487294.pdfIn PDF document text
    • https://cdn.sqhk.co/taxosavasesa/dhiahch/vuxunopade.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/aK8gchc/49896814300.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/bigobawigaberel.pdfIn PDF document text
    • https://cdn.sqhk.co/zozevuxe/hbw3PJ6/date_function_in_google_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_601424942be16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_602fdce7bc767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_603fa6dfa9189.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/AQtCid9/mobenizuvofasimexefoteme.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/dkjjjeB/89319901430.pdfIn PDF document text
    • https://cdn.sqhk.co/baxewoxevum/2igANia/xerijapipojorevabuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471114/normal_60279601c8b2f.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/tibanepoxilibud/2099733278.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/schwinn_airdyne_repair_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/bosatijinikixune.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/98383860638.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_off0001025d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025D 5212 bytes
SHA-256: 60362224e62850ff7a54b5e3352f7fdef54b2f73b2c5dcba9a25db1369d71955
font_01_sfnt_off00011418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11418 11320 bytes
SHA-256: ba7c6ffdc6f5c37e37f98d2d504d42224dc04eed6030e7ec45c83762d41f3995

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