Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd734484fb46eac…

MALICIOUS

PDF

70.6 KB Created: 2021-03-25 03:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 60d2166d6b4225713bac7046358a83dd SHA-1: 89a88586d226ee0860aa8de5ea4dd986ef90be98 SHA-256: 8cd734484fb46eac6b9277a5df0b5784682b4c7b2f044f84924f2d306c454310
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-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://ponafet.ru/123?utm_term=bose+soundsport+free+wireless+guide PDF link annotation
    • http://noverst.xyz/zugubasusufuruwifelisupork8xz4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_601a10de7d0d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_605bc0d813240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375195/normal_5fcaaf807150f.pdfIn PDF document text
    • http://teachost.com/84421133184exix0.pdfIn PDF document text
    • https://cdn.sqhk.co/sepifoxe/cqjcOLG/bengali_movie_prem_amar_songs_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/dha9ifq/49116758892.pdfIn PDF document text
    • http://technodom11.com/rudukyzyp2.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/KxihBev/justin_s_house_friends_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_603c37f0093a2.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/fhfE8gi/classic_rock_music_station_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_31f383e36f0c4f3ba45c3e2f4eb21d36.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/aambala_tamil_movie_moviesda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f897a1d-58db-4d24-ae1b-30579442b662/chaos_theory_definition_sociology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f7bf62-bc9a-4040-8e69-df7e269861e5/how_to_control_sony_soundbar_with_samsung_tv_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19119de2-7ada-47a9-a35c-c90afa1c5397/azar_grammar_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/tavikifisuro.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_fcc1e1af73b84873b0238a43f5b5245c.pdf?index=trueIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_cc0bdeaa1e2f4459bbd89a0a6532cf3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a4a1a7-7870-4888-a212-0a9aa78186a6/kufekofole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae592ef-71cc-4d3e-90fb-e34700bc6c48/9716557071.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/icloud_control_panel_for_android_tablet.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_off0000d7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FF 5140 bytes
SHA-256: 83507c94546c55b993e8ad3d15ba8d09030256a69696fec1acdfee2d812ed1fc
font_01_sfnt_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 10264 bytes
SHA-256: 630c148f7c758e785ead76c1fa6d20971ad2cab3e86385de4cd85f2cf91021e0

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