Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6ae938f3f78dfc…

MALICIOUS

PDF

77.5 KB Created: 2021-03-22 07:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 093541d3584a3d1798ac049f913a47b2 SHA-1: 535900e5d1249845aefd8f2ff5a83b138d5ebca6 SHA-256: 2b6ae938f3f78dfc205182b8faafe181e00b9fe86cee4fd1dd81629580c8c3c8
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 0.9991

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://vilenefex.ru/123?utm_term=best+bollywood+video+songs++site PDF link annotation
    • http://pidebuzuvufugi.22web.org/29724092079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_6056add1c1b2c.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/jevamizamokesak.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/egghcja/collage_maker_free_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485930/normal_603f81b29975d.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/skagway_alaska_map.pdfIn PDF document text
    • http://gixelube.iblogger.org/31004368746.pdfIn PDF document text
    • http://ratedewu.scienceontheweb.net/dabivebozetizobetaroboz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_6041c724d4003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417045/normal_600a0cbc34087.pdfIn PDF document text
    • http://totakonepis.iblogger.org/56558836270.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/hb2iajj/99_red_balloons_vinyl.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/heiggck/2019_honda_accord_sport_manual_sedan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_604a3a3a88209.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/gvT8UAb/unstrung_light_ballista_osrs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_2ef02cea90c9469c98923d684c188e5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4771fd8-340f-4af8-9e3f-9774cbd8ee8d/jogomamewakudimofopigul.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_51804309c959433c925de4ee49c05989.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce90a0b-92ea-405f-b862-14d39b82f04f/cost_to_replace_moto_g6_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9844f913-93de-4569-8bf1-9fe01922b7da/43844634560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0845ef04-b2bb-4ce2-99b9-dfff5b9609a0/what_makes_a_man_charles_aznavour.pdfIn PDF document text
    • http://ketavulamuxi.epizy.com/23917978301.pdfIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_f300151ba52e4bacac9af1505594c4bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2d739e-818b-49a8-83a3-9a3d813cbb99/how_to_say_thanks_for_prompt_reply.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_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 5132 bytes
SHA-256: d4ef8e208941be49ddb815055bba350358e73e9fab279acddb3d4410a9defafb
font_01_sfnt_off000102e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 11052 bytes
SHA-256: bd26380659e6bf214e9c4ce899b62098fc4ba3dc6b0740e71e5e444e0a0cd379

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