Malicious PDF — malware analysis report

Static analysis result for SHA-256 48982faca9f236c0…

MALICIOUS

PDF

74.7 KB Created: 2021-03-27 14:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 26cf5901d525896bbf1b82db36341069 SHA-1: 1205dad616f1a67a25f2c42dcce406c61e5d4b7e SHA-256: 48982faca9f236c0d55feda43edef9e2d19349c3941b66ab11c32a6914801635
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 0.9996

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://kuzutuzo.ru/wix?keyword=carb+backloading+1.0+pdf PDF link annotation
    • https://cdn.sqhk.co/wevafofed/gcaYyib/woditoveg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501198/normal_602a52b8ebcc6.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/46794194025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_603355cf41cd8.pdfIn PDF document text
    • http://jewofuvivonog.getenjoyment.net/first_year_bsc_nursing_syllabus_kuhs_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_60539644bd632.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/hdiifYu/zombie_sniper_last_man_stand_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/titukopano/jjdkiib/91405167076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491926/normal_60431af8b95fa.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/j3Bhbii/talking_birds_for_sale_in_austin_texas.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/biography_books_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_5fcfa4fd4425f.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/ZjTjbgv/zombie_royale_warzone_lag.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/cJghrhg/56248050100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee39b645-2c26-4c26-ae50-f9b2b9c6e00a/translator_english_klingon_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/ripivevitefikipisewopipef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de4c526-878e-4454-8f76-3c214f51284b/mcdonald_s_holiday_pie_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfa0a02-52b5-4bf2-bf2a-fa52cdaa5e5a/41066743142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bdc4c4-1987-4729-a338-6c1ca3bf0893/blood_bowl_2_norse_starting_team.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d6c964-0766-44ee-b13b-cd7dc401d61f/roluvisometixazo.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/noxikadopojepati.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/41430769617.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_off0000e638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE638 5480 bytes
SHA-256: c5c24946ff49c39e575215ef2e5ba39b7f137f34b4a105f8d848be16a9fb803e
font_01_sfnt_off0000f8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F0 10780 bytes
SHA-256: 1f009c23b2ed042f3b4608b45cd78f3f2ad5458f647858956dfeed0680a987f7

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