Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead22b9a6b98cf0f…

MALICIOUS

PDF

98.6 KB Created: 2021-03-29 15:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c7b5d889ab8cf4faf0f41c4c849954c4 SHA-1: 5ce2d11a4ac4ccd2d46f48155e00d42cbe41ee8b SHA-256: ead22b9a6b98cf0fc9392ce527ffb5b80c81e04c5cf1f6dcf547c5dba5c2a3b8
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 0.9997

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/award?keyword=batwoman+comic+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/widagawinud/70bYUhh/dilom.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/aWjFjet/baxodilaranudoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_601ad53547b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_60112e7a2ffc3.pdfIn PDF document text
    • http://lawewonuraxap.iblogger.org/batman_begins_screenplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_5fd24f79307b4.pdfIn PDF document text
    • http://zajowidased.iblogger.org/56831674969.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/fxmihKL/solitaire_games_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456712/normal_601250864f6de.pdfIn PDF document text
    • http://tularafujebok.iblogger.org/soundcloud_go_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414332/normal_5febcde995f2a.pdfIn PDF document text
    • http://neditaxuvim.getenjoyment.net/majilenujofigu.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://s3.amazonaws.com/jolozidabi/sas_enterprise_guide_put_date_format.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/innova_3100_obd2_scan_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/polaroid_template_microsoft_word.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/badifosixowexes.pdfIn PDF document text
    • http://xojabujujipeze.rf.gd/31763866989.pdfIn PDF document text
    • http://tesodefodavi.rf.gd/ai_neural_networks.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_off0001332c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332C 5348 bytes
SHA-256: 5dced054aad6dcd42c85dbefdc32b950f58009ba9e75c96b9bcd5cb26f632040
font_01_sfnt_off00014516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14516 12356 bytes
SHA-256: 9b0cd378c1d6b4ca2aaaf168abdb6b1d1f61f574509ac8cd271568baddb632b5
font_02_sfnt_off00016d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D61 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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