Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69571fbfc4f9e3c…

MALICIOUS

PDF

75.0 KB Created: 2021-02-20 23:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6f14279256a1a098d161bfeea4c49f1a SHA-1: 323003273c3d71484335e094654bb76bd409dfa5 SHA-256: c69571fbfc4f9e3c4eea7c612ee7a6105891ed538ad28b64c9d793a2787480e6
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-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://crophysi.ru/123?utm_term=texto+expositivo+de+estructura+problema+solucion+ejemplos PDF link annotation
    • http://com-signto6.xyz/beyblade_burst_apk_and_datatrjih.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_5fdbbe348fb2a.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/NjfLijW/homemade_cake_recipes_without_oven_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/cDEifHd/fitbit_watch_amazon_prime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370077/normal_5fef495ad9647.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/gr3gedu/rusazajafukogevitasonu.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/heiihbC/bluffton_sc_hotel_rooms.pdfIn PDF document text
    • http://d2-club.ru/trumpet_major_scales_finger_chartidlj5.pdfIn PDF document text
    • https://pokotozumunas.weebly.com/uploads/1/3/1/4/131453498/9895391783914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_602c6eb0d7598.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/hish69g/37465102341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5fddb601867a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5fff9c38b16ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465394/normal_602e6d4fb2ee2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391898/normal_5fe13940e4a9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461511/normal_6002a7aa9ba62.pdfIn PDF document text
    • http://priz24.site/zavozugebipubinoxura8vamr.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/Bhjugfe/uphill_highway_construction_road_building_simmons.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/gpjeDL3/4567473948.pdfIn PDF document text
    • http://detonic-romania.website/473940128620awqo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 5512 bytes
SHA-256: 2813e413f6797f578d32005c5327193446edb186375c8ce02e442b37c9353435
font_01_sfnt_off0000f6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AD 11824 bytes
SHA-256: a6b6cee02936c72c5af0c2560cb0fe5ae9806b3bae4c193fbaa458e7214fbbdd

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