Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09358f4f21f16a3…

MALICIOUS

PDF

70.8 KB Created: 2021-03-19 19:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e194186c2ff67416c46e86fcafa22dfa SHA-1: 87653e8c4458973d3f187e46171ff1dd82efcb10 SHA-256: c09358f4f21f16a33132bd62ccc4839e742a7154dab084554a912e44411c981c
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://seumenha.ru/wix?keyword=wade+organic+chemistry+9th+edition+solutions+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/gukokefa/Awgd1q8/14060096477.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476924/normal_5ff0c8a863b2d.pdfIn PDF document text
    • http://bupitubegedew.getenjoyment.net/14787310588.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/d0Rn7fe/viral_video_dreams_cranberry.pdfIn PDF document text
    • http://cmbespaceclient.xyz/69133821026c437k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417818/normal_6050e2756c7f7.pdfIn PDF document text
    • http://csxmoney.info/vacation_under_the_volcanoj0zgx.pdfIn PDF document text
    • http://worldthailand.fun/how_do_you_reset_a_whirlpool_washing_machine434qr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5fe713a9d8492.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/dVjeaS7/muxawugobixejili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_6027e2e3661d3.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosemubo/KMgeUjf/95814063303.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/hifxggW/11499227837.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zefabuvo.rf.gd/quantitative_research_design_example_survey.pdfIn PDF document text
    • http://kosinatatit.rf.gd/89292792012.pdfIn PDF document text
    • http://gelotamarabi.epizy.com/nurusikevewaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de2f3c2-3a5f-430c-ae25-bfeca83c74bd/what_is_the_variety_of_species_in_an_ecosystem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11d2d21-3595-43ad-a9f9-66f03af7b780/fonuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7e325b4-bab1-4d05-a684-a5410e345039/adobe_package_design.pdfIn PDF document text
    • http://beliraguw.onlinewebshop.net/khng_m_c_file_trn_my_tnh.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_off0000d215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD215 5840 bytes
SHA-256: abf68e8b70fb28d9228945d2d5204ff3d11dbfe38807cbe931bd38d02879f410
font_01_sfnt_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 12144 bytes
SHA-256: 0f0f75af981b1b72a2bd5280e36848b1a450bfb11dad9dd28318ff39a1009aef

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