Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb14df1325540f1…

MALICIOUS

PDF

79.0 KB Created: 2021-06-10 06:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f1f7874910a5c0e86573efb1a885ccca SHA-1: d722b648860ff442b4c35c058f92d66a78c84d44 SHA-256: 8bb14df1325540f13671f45e6d62b390d17654ada9c91ebcbe9570ebe70d4b66
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 0.9998

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://crewmak.ru/wb?keyword=is%20the%20stand%20on%20cbs%20all%20access%20yet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403140/normal_603bb87000fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_603bd06dd9d62.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4368248/normal_60b0f62607e77.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4489838/normal_60b64376bcb01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fafevupu.pbworks.com/f/gabuvokerudatujoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5522c0c-fa9b-4a21-a387-099df17b68be/26028745638.pdfIn PDF document text
    • http://natetusiwuwo.pbworks.com/f/mojemurudetu.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/f/geometry_dash_2.12_noclip_pc_2.11.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/f/patumabutitikazafos.pdfIn PDF document text
    • http://jizakatum.pbworks.com/f/13974922067.pdfIn PDF document text
    • http://gapufipi.pbworks.com/f/gabixezowekitujej.pdfIn PDF document text
    • http://marutipug.pbworks.com/f/thuppakki_full_movie_download_tamilgun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69790567-a5db-4fab-9a24-9308e0e542c0/how_to_change_dualshock_3_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd6ffc00-d3b2-4d6a-9937-73392d10b5ea/10734333140.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/88500012618.pdfIn PDF document text
    • http://lewomirat.pbworks.com/f/ragiwevoganugimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a659571-4ac9-459f-878d-94b7eb65967e/how_to_set_up_bookkeeping_for_small_business.pdfIn PDF document text
    • http://bupataved.pbworks.com/f/jebumebofa.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_off0000f746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 5112 bytes
SHA-256: feffe488f2cd44268e85b5f135a9fcb0a4b6e5fc0620dab7f022f2c763b9d699
font_01_sfnt_off000108aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AA 10984 bytes
SHA-256: c1a60cf78d0538264d1abe1a9f207bb6ab73c0c2b4072aea8976ee61dca29219

Open this report in the interactive analyzer, or submit your own file for analysis.