Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca742507ff390c4…

MALICIOUS

PDF

77.8 KB Created: 2021-03-22 19:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 698062192be917ee8da58c8aaf0a3eef SHA-1: 8c23234b0901b9eb44a843a47ba8b8d7d6991b4f SHA-256: dca742507ff390c43719e1368bfa6e56293b412d657a97c5a7609a6aca32901b
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://zajinet.ru/123?utm_term=motion+templates+folder+fcpx PDF link annotation
    • http://povisowalikim.scienceontheweb.net/4th_grade_math_multi_step_word_problems.pdfIn PDF document text
    • http://nakozek.mypressonline.com/reduce_file_size_nuance_converter.pdfIn PDF document text
    • http://ganoget.scienceontheweb.net/zalolawidaratano.pdfIn PDF document text
    • http://rm-swis-mine.com/daredevil_season_2_episode_guide5ygtg.pdfIn PDF document text
    • http://jobware.pro/vajefigaxezovoduvosopez4d6b.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/37674051674.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/zosupiwelixiwazizowe.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/libro_para_aprender_a_tocar_guitarra_gratis.pdfIn PDF document text
    • https://pakimisubimoge.weebly.com/uploads/1/3/0/7/130776027/6492845.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/ispe_good_practice_guide_cold_chain_management.pdfIn PDF document text
    • https://pujowelitolav.weebly.com/uploads/1/3/1/4/131438356/fd7dbde38f698b.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/1f7610fb-092e-4964-a4ee-02148f4ae173/67272886374.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/android_version_names_a_to_z_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/dopiwunubutatuxigeroxobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/874d494e-ae6e-4c2a-899f-408e25fa9cb4/64182935444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341e9434-a5dd-41be-8899-32e9086e93eb/briggs_and_stratton_675_series_carburetor_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/android_studio_adb_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce67ff5c-b56c-47ce-8895-37dc7c639014/sipinosamewalidegabegor.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/ridop.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_off0000eefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFB 5376 bytes
SHA-256: d6681bba015dacf9004c84e5e392bc6d87d0da0859519d045b25e23d7c0f2460
font_01_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 11696 bytes
SHA-256: 96c1b562082c18146a835f181381218a7cc96cf141183eaf2445c9e6bd0b3877

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