Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2c35551f267de8…

MALICIOUS

PDF

76.9 KB Created: 2021-05-24 23:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c14c0bc4969ab62b29c6efc3db22a514 SHA-1: cd12ab01e7b9fcfaea241e84b39befe9dc422ad7 SHA-256: 3b2c35551f267de8607b9a7e6bd2771817382bdf4a5f76217d223b5bd8ca950a
156 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. 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=sight+word+stories+for+kindergarten PDF link annotation
    • https://pikivazok.weebly.com/uploads/1/3/0/8/130873779/sonogiveke_sopojop_volifaget.pdfIn PDF document text
    • https://digakope.weebly.com/uploads/1/3/5/9/135974251/5ab8561b1c2279.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377388/normal_5ff10cf5ad7d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408002/normal_5feb46f82304f.pdfIn PDF document text
    • https://fejajeger.weebly.com/uploads/1/3/4/6/134614243/kogunomop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421460/normal_5ff61889a1af5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_60014899bb3a7.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/e43c83bf0225.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/4578325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415929/normal_60223f1c6636e.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/ccbe145c-537d-4e1f-bdd7-468bc51eac88/troy_bilt_junior_tiller_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/nugow.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/poomuthole_piano_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/shure_qlxd24_beta58_g51.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33bf178-3b06-4007-8e16-4065b7e44766/what_does_seeing_644_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/97594421730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1532592-c176-4fd3-93ab-0f1def73adec/27489550075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4cc1b5-93f6-4b10-afb1-389083a09e67/nuzawulosowevin.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/asus_sabertooth_z97_mark_1_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1580dc0d-1d49-4e2c-8002-270a447ed268/relaseluvorugixozewoxivoj.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/aleister_crowley_livros_em.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 5184 bytes
SHA-256: 6761ffdec818ea819dd49b3fa6cf0b913cc1cbc1242f0fc4f180cf530e29c1c0
font_01_sfnt_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 10576 bytes
SHA-256: 9db493d9cf1ccbc6921ecb9c1fcfb2c936bb1ea5a7d8780ba3ff130d23b15781
font_02_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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