Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db0de0a80d9ab06…

MALICIOUS

PDF

95.6 KB Created: 2021-03-12 07:37:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 43f11bd1e977539d0baff2723b9ba84c SHA-1: 32d3751b45ae292974d02b0552db338a799b1757 SHA-256: 8db0de0a80d9ab0615b1647d32d5e93892f17a58efb401a1fdd48a8de77b7470
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 0.9997

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://kuzutuzo.ru/wix?keyword=manual+garmin+fr70+espa%25C3%25B1ol PDF link annotation
    • http://boost-store.net/fetokujesezezusaplaoa.pdfIn PDF document text
    • http://motirepefasake.iblogger.org/live_streaming_video_android_github.pdfIn PDF document text
    • http://fazudiwufapu.iblogger.org/how_to_program_a_genie_universal_remote.pdfIn PDF document text
    • http://airet.space/lorebanolereme8tww3.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/wuvisegena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_5fe6962f596c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_5fd61315ea60d.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/saxavivosudepipixixavub.pdfIn PDF document text
    • http://instapriz365.online/presto_cooker-canner_no._7av_manualmclaq.pdfIn PDF document text
    • http://about-igsupport.com/pijodawifaworogezi81tce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418796/normal_5fe095f56ad59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494677/normal_602a10b9d153e.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/words_that_start_with_koa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426813/normal_5fef62295f7c6.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/motorola_surfboard_extreme_sbg6580_firmware_update.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/davolazupivowi/vopalilisozanux.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/pokemon_soul_silver_nuzlocke_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/87126410480.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_much_does_ms_project_cost.pdfIn PDF document text
    • http://kopixisaxet.epizy.com/black_hole_theory_of_relativity.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/xofuriluzobuvu.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_off000139f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F6 5660 bytes
SHA-256: 7552a6f643fec56011d2819a745cd04c2cc0c353417a02e864c27af923bc6313
font_01_sfnt_off00014cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF9 10076 bytes
SHA-256: 65bf9dffb33569f98ec69879911395f8948c425acadc4878cf213745b2e82aea

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