Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ad9394f5c86122…

MALICIOUS

PDF

78.2 KB Created: 2021-04-11 02:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b3d9746e7df100593cb7598ae35055c1 SHA-1: 591a3cca7b18c79524837a948ed514450fa294fd SHA-256: 66ad9394f5c861227170509402021a50b397453436257f23399a5497916581be
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/strik?utm_term=how+do+i+find+the+kindle+lending+library PDF link annotation
    • https://cdn.sqhk.co/kobewudojuvo/gSasAgh/united_airlines_plus_points_upgrade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_6047b7994ba1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_602a6fd18cc85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410694/normal_5feb69d006ea7.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/uShfHii/mdacne_vs_curology.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/Qxhd6d3/kifuturopegikiwatavizej.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/vulojokefetubope.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/how_to_change_transmission_fluid_honda_accord.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_60166fbc2b418.pdfIn PDF document text
    • https://cdn.sqhk.co/zujijivopuju/hje1jce/adventure_landing_hours_buffalo.pdfIn PDF document text
    • http://wiboratiraveguw.mygamesonline.org/edgar_allan_poe_poemas_e_ensaios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3ced7500-43b7-4367-b758-85bb0d5eecf8/what_size_bar_is_on_a_stihl_ms290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4086d535-d24d-4b58-948d-5aa50bcbdb34/boss_tu_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dccfe03-b0e7-4028-8678-1f8b409e7977/urban_dictionary_whippits.pdfIn PDF document text
    • http://muvamubas.atwebpages.com/dezuvepikikobugemejoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b636911-7a92-448e-8100-058112ff9152/la_biblia_hablada_isaias_1.pdfIn PDF document text
    • http://mizetum.onlinewebshop.net/jakebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93ea476-1f40-4a03-8831-bec65e521b00/grunch_of_giants_espaol.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/vokenogagerifikop.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 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 5136 bytes
SHA-256: 534fcb44493c8ffbc4d753051f9b643e51b91b0c26d45d8374ab01ea8ff87a71
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 10960 bytes
SHA-256: 5435310800284fd8733131f8f8f7767683e107b81f56b30241a605677900ce6a
font_02_sfnt_off00011d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D57 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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