Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2c951bd1010678…

MALICIOUS

PDF

79.5 KB Created: 2021-03-14 09:17:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 79bbcea2ec591b046efe14954e578596 SHA-1: 51ebb9f1f4923537d5e8577256b2377179e115da SHA-256: 1d2c951bd10106785f0f8ef0dad4537319c43ba4c5f5c1a1240ce53fb0cfb504
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 0.9991

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://gimoguvi.ru/strik?utm_term=harbor+breeze+fan+remote+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486036/normal_603bcb029e294.pdfIn PDF document text
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/4fdd1a1e2cea1b.pdfIn PDF document text
    • http://uaregroup.com/865171539766thvt.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/8659937.pdfIn PDF document text
    • https://wosixuluwur.weebly.com/uploads/1/3/1/0/131071196/d6a4f1f5340e912.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/vr_karts_sprint_apkp9dz1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426260/normal_5ffcdca0d7703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_600b55265c2ff.pdfIn PDF document text
    • https://xibixijuli.weebly.com/uploads/1/3/5/3/135399677/2381127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_6028576289b56.pdfIn PDF document text
    • http://juxowupekabaf.mygamesonline.org/mefakedamaxubunupogesibe.pdfIn PDF document text
    • https://xitarowax.weebly.com/uploads/1/3/2/6/132681505/xokowazej.pdfIn PDF document text
    • http://copytoshka.ru/sony_rx100_iv_second_handbpe0q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449184/normal_5fc5cf471b6ce.pdfIn PDF document text
    • http://usechambre.xyz/30020878321wd595.pdfIn PDF document text
    • http://wojisub.mypressonline.com/pioneer_avh-x4500bt_bluetooth_update.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vukujidor/46323462571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/735fb02d-6a7d-4363-b3b3-209e82e65276/html_tag_injection_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37617f6c-81fa-42a7-bf49-0a69e861d215/tuzixezolimefaloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6c08aa-48bb-410f-a059-a7c06af48936/venov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/235dc8e3-1bd0-40c2-b108-693f92652833/mazowivezo.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/algebra_1_inequalities_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/bokeh_filter_photoshop_free.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/piste_map_cervinia.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_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 5284 bytes
SHA-256: 03a78a1200e9112132b3832153a6a4b3c1b5ae9c073053a957980890a83f14e5
font_01_sfnt_off00010c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6A 10428 bytes
SHA-256: 1c8733fd80c6bbb707aed872b8c149fabe220fb507c10ed479ab1e3fb2791ae0

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