Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eecd3e441184aee…

MALICIOUS

PDF

71.2 KB Created: 2021-03-13 22:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: af1b1b254689c43c9b9f521318808409 SHA-1: 950f12d21d4854b6935eec5624dfda32dcfeed02 SHA-256: 8eecd3e441184aee38d90cfe72f38c5399a0cdca157806a12415fae776ca8b02
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 0.9998

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://resalured.ru/wix?keyword=tascam+us-1800+power+supply PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387424/normal_601be01cb195a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470016/normal_5fdcde378fd3c.pdfIn PDF document text
    • https://gazikurow.weebly.com/uploads/1/3/1/4/131452893/juxer-denesif-jivoxozu.pdfIn PDF document text
    • https://sasominafa.weebly.com/uploads/1/3/4/3/134362810/mazozaj-xowajox-jusademegugu-widudavowusawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496586/normal_602793fb4c700.pdfIn PDF document text
    • https://fasitidepev.weebly.com/uploads/1/3/4/3/134312072/setisakotekivijobaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392462/normal_5ffae02113f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_6028f8b738733.pdfIn PDF document text
    • https://muxupodijem.weebly.com/uploads/1/3/4/8/134885552/d77caa2e1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489740/normal_5fe2503523b53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454999/normal_603dedeac92e9.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/ziravitimuzunalikon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475389/normal_5fe9aab6c866a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455194/normal_5ffe86a9b5b35.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/b1ea2a8e-2c34-4b55-9faa-6f203607f99d/20295492106.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/63457647565.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/kaththi_tamil_songs_doregama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa5a5ad-3bf2-40da-99b8-b74a35f093aa/world_history_quiz_questions_and_answers_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12886d41-db92-4844-a409-a88f492224f6/how_long_do_you_cook_ribeye_steak_on_george_foreman_grill.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/molecular_genetics_review_worksheet.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_off0000d80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 5640 bytes
SHA-256: f52864f3fb66c9c5c3123fb11e6c1570a52c1db2d2e3c299e40f7ad73ff26838
font_01_sfnt_off0000eb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 10764 bytes
SHA-256: 8a6a07b794999a775264999e7fddf58ab1d4f9ce53ce867e71ccb1f7f8a7f21f

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