Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b0923939b7cf2f…

MALICIOUS

PDF

68.7 KB Created: 2021-03-25 05:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59b445471ba62a2b00a80b5e8bc4c660 SHA-1: 5b614dab9e873ebf7b0834f56cb673fccd2e3b62 SHA-256: 22b0923939b7cf2f25efe0453725559e782436b169b87fdecc29d00c8f2e26d1
186 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 0.9998

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
  • 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.
  • 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/award?keyword=flight+stability+and+automatic+control+solutions+pdf PDF link annotation
    • http://trastqort.online/43857639637ow9r5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_5fd67d5c3dd60.pdfIn PDF document text
    • http://opensoda.pro/evinrude_wiring_diagramsjd4qj.pdfIn PDF document text
    • https://muwegegedagus.weebly.com/uploads/1/3/0/7/130738526/5588297.pdfIn PDF document text
    • https://bagekitavaseb.weebly.com/uploads/1/3/1/0/131070055/ratelimox.pdfIn PDF document text
    • http://presalon.xyz/first_angle_projection_drawing7mk9v.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/subezozuwirolo.pdfIn PDF document text
    • https://pomadiwu.weebly.com/uploads/1/3/5/3/135313662/jewuj.pdfIn PDF document text
    • https://mitewowepo.weebly.com/uploads/1/3/0/8/130813710/tisobamegov_jumojij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416332/normal_5ffe51b16c1db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381536/normal_6055811156b6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1910ec4e-554c-4a2e-af5b-79ee445dd4a2/will_concrete_cure_in_cold_weather.pdfIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_0be0ac5a015741fea51f91404454eafe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/lagu_wajib_bendera_merah_putih.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/interview_evaluation_matrix_template_excel.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_f8f30024fcde40a1ba3865660c45e995.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/002279e6-5465-436a-a7aa-07b6539d9763/i_am_that_i_am_spiritual_meaning.pdfIn PDF document text
    • https://ecf1b359-4982-44d9-836f-7e6f5fec4aa1.filesusr.com/ugd/da15c8_3f2dafe9a1834613b1f1701e4ba15d6f.pdf?index=trueIn PDF document text
    • https://0c241ebc-151b-48bf-a4db-a9f2ee65d67b.filesusr.com/ugd/c17081_f5c10608cf714cf0b6df15349e700d68.pdf?index=trueIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_7141c37b3003438197fec4e55202b69f.pdf?index=trueIn 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_off0000cf4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4A 5764 bytes
SHA-256: 07b4f168af35da2a5d00c9060d549f1b249524a99218bd2cd289bbe1b7f19284
font_01_sfnt_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 9996 bytes
SHA-256: 1ed73e31113a582aa095cdaf0a069c5d5a619523459a649a938e20c19631bf18

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