Malicious PDF — malware analysis report

Static analysis result for SHA-256 36960369b5b85004…

MALICIOUS

PDF

74.0 KB Created: 2021-06-05 07:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 29a9c89a5d08b27523451f5e1b8c27e9 SHA-1: 535e19ed5a3e203845b5cf27a77a763a7d27b888 SHA-256: 36960369b5b8500489712ba4c99dd135a81a5d1e093285fcaaed95084b170304
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://irlanc.ru/pbw?utm_term=sleigh+ride+flute+sheet+music+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427509/normal_6006181330518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495246/normal_6026ed714ffea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_6034dc9f41d9e.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4473041/normal_60afe56bc3117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474999/normal_603fc46adc54e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_603b03df2a923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454429/normal_605861a9b47fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470019/normal_5fdb3f4f4418c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456132/normal_60504aca3ede1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fd640f6e4ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_601a4975aee19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudejob.pbworks.com/w/file/fetch/144576729/54443175789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e837c5-0c5f-4d2b-a640-7102a3ef9ed7/how_to_setup_netgear_router_as_a_bridge.pdfIn PDF document text
    • http://kivotin.pbworks.com/f/how_to_open_lg_inverter_ac_for_cleaning.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/w/file/fetch/144493383/ripogurelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87338eb-bd05-4fdd-a7da-a959c8664f8d/81182680239.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/best_10k_training_app_free.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144590736/how_to_see_archived_messages_on_messenger_app.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/super_smash_flash_2_unblocked_663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6379cd72-6f5d-4032-ba6f-e0891e60ab64/54049021489.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/what_is_the_difference_between_waterfall_and_agile_software_development_lifecycle.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 5464 bytes
SHA-256: 0ca1fa2dd2c38ebd72d9957e285e4010372769a069154f4c818c7a0ade452ef9
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 10016 bytes
SHA-256: 51c482cd3b80899d8ada946f464e2559f685ff4c497ab4d4d3a5656deaf9eb06

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