Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45868c6b19be985…

MALICIOUS

PDF

80.5 KB Created: 2021-03-31 20:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a7af94904b4c8b38779811b23012c364 SHA-1: c1e581bc2fe094197a0fe0b4c5059df100126166 SHA-256: a45868c6b19be9853fff0eeafb6912733950eedf584e5b90f478592f22b23f07
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 0.9996

Heuristics 5

  • 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 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://kuzutuzo.ru/123?utm_term=abstract+reasoning+practice+test+1+pdf PDF link annotation
    • https://kazamudadi.weebly.com/uploads/1/3/0/7/130775411/wuwuma.pdfIn PDF document text
    • http://leopolds.space/girowazesajenitesevani5r34x.pdfIn PDF document text
    • http://logoped-samara.ru/34276227527hanhu.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/bc03296c91a94e.pdfIn PDF document text
    • https://wovodolu.weebly.com/uploads/1/3/4/8/134861979/xuzuvixurife.pdfIn PDF document text
    • http://clientesdkb.com/37489206148ax1fm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kasaxamaburabuz.epizy.com/philips_ac1215_20_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/how_to_connect_yamaha_mg10xu_to_speakers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c79cba-18c2-4ddb-b064-5d6aeb7073c7/zazuneji.pdfIn PDF document text
    • http://woxutubutofewev.rf.gd/technical_specification_document_example.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/component_stylesheet_angular_2.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_fc327edb0fc14dc39d77ff6e1b8187ca.pdf?index=trueIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_e0a7ec47a11841fe91f6ecfbc6dd3f22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/zomilerurusivuxurunexare.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/nufeguzokirigu.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/10182761369.pdfIn PDF document text
    • https://298c7861-702e-4dad-8e6b-798164301c36.filesusr.com/ugd/98adb1_9a6ced595913444cae74e4215b6b888f.pdf?index=trueIn PDF document text
    • http://mixivilewajule.epizy.com/beped.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a078ff27-600c-46f9-90cd-afbdc647b07b/53553113472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b314339d-ce63-4555-bd66-eb9b4a1108ed/66349747906.pdfIn PDF document text
    • http://kasupitebuse.rf.gd/41116446363.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 5472 bytes
SHA-256: 762f5d819c6dd4db0ece7c1cc153e5d9473d5c392d109175bded712a63a000e3
font_01_sfnt_off00010e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0D 11204 bytes
SHA-256: 626c485eef361ef2d5350142cfa293e71f6b5df1da71d3cff1990b178fd85421

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