Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca6267df97130a3…

MALICIOUS

PDF

78.9 KB Created: 2021-03-16 10:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c89f73ad81e4a5017ef73fe7c718c00 SHA-1: b31184c28787f63047290acc54cf7f4b8649a873 SHA-256: 8ca6267df97130a3c207884d84dc81357090c73e381d86c20a9ff3bc15d4ee1c
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 0.9993

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://ponafet.ru/strik?utm_term=fun+soccer+practice+games+for+5+year+olds PDF link annotation
    • https://cdn.sqhk.co/zetanitanedo/haieKet/38411252827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480904/normal_6030306f5fe71.pdfIn PDF document text
    • http://negozio50sconto.info/envy_4500_manuale199y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fe2135793447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_60449f416d1fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457592/normal_5fed0b36492a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_5fe278873c1b8.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/asana_app_storejcvrq.pdfIn PDF document text
    • https://cdn.sqhk.co/rabetejorazi/jzhidPL/markup_on_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/bsytugd/epsxe_for_android_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/ctgeGH8/gefefi.pdfIn PDF document text
    • http://latencfsrt.space/rupexudogajuwikimn9dm.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/MhgGsll/26577090480.pdfIn PDF document text
    • http://instahelpforbusiness.com/nejerigazuwugubikevujarabias2.pdfIn PDF document text
    • http://file-id.ru/23540804228sovgn.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/jevelel/resultat_guide_michelin_2019_alsace.pdfIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_bcff3d98ed52462ca183157efedd7ad6.pdf?index=trueIn PDF document text
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_8b1111640d7c42889d11e32ad9e9bb53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fapaga/sylvia_day_afterburn.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/28879366765.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_caf7872c56f84a6da197d231f8ddfcf7.pdf?index=trueIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_7f82c99f25d649bfa8362bb89dacbb00.pdf?index=trueIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_0a44de5c26f54f4faf7132df8029c247.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/cbs_sports_fantasy_football_cheat_sheet_ppr.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/acute_mi_treatment_guidelines.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_off0000f664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 5656 bytes
SHA-256: 07ea6dfa122687d20c040402998ffd0c547e07a3314dc2430f60ade0d459e741
font_01_sfnt_off0001099e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099E 10728 bytes
SHA-256: 043d73fdb709bf0a51f701126fb1bf47b5d9d70008e140fe54497bb67e6fa826

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