Malicious PDF — malware analysis report

Static analysis result for SHA-256 351808e70043ea48…

MALICIOUS

PDF

74.8 KB Created: 2021-04-30 04:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 44a29d0495ef0287d43c38ee7d152ecd SHA-1: 9ef283d76512786305c592a1c23ce8ccc1bf1b25 SHA-256: 351808e70043ea4824502a67c4bbf96395ad671bdaf3fb2f315583a9e57fefde
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://bologen.ru/strik?utm_term=one+touch+ultra+mini+instructions PDF link annotation
    • https://cdn.sqhk.co/losomilodip/7Ejeia0/that_s_life_lyrics_killer_mike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_601fcfd3784f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_60143232a2db8.pdfIn PDF document text
    • https://widegavadiwudux.weebly.com/uploads/1/3/5/3/135325068/e62ea.pdfIn PDF document text
    • http://jafepakapexi.22web.org/portland_cement_production.pdfIn PDF document text
    • http://nawogevimogagu.22web.org/cuales_son_los_dolores_mas_comunes_en_el_embarazo.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/iafgijh/ixl_learning_center.pdfIn PDF document text
    • https://cdn.sqhk.co/musarawaw/7uF7jeK/pinutabugiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/gjgjtjc/putanagolipelo.pdfIn PDF document text
    • https://bikewodeganesu.weebly.com/uploads/1/3/4/5/134596115/25a784c1183b7a7.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/07029a.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/thi9l3X/64166705975.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wezebiwudure.epizy.com/chrome_offline_installer_terbaru_64_bit.pdfIn PDF document text
    • http://tebafifara.rf.gd/league_of_legends_repairing_stuck.pdfIn PDF document text
    • http://benamow.myartsonline.com/android_2d_graphics_with_canvas_api.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3630644-b235-4892-aa41-c8a7b299290c/pegel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5b6f2b-99fd-4ad0-9a95-9d2d9060730e/976447688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a081b95-eff0-407d-96d5-4ef0e93448cd/41639691537.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/veterinary_antibiotics_chart.pdfIn PDF document text
    • http://silapopo.epizy.com/activated_carbon_air_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b053eb8b-9862-40cf-97a0-9ee8b4e8ff66/tepebuwejarotexanavajor.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_off0000e77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77E 5064 bytes
SHA-256: 821de5434b9c1a85986f2e2fc9e797dee34f8f5fcf8a8e754de733bdde9278b4
font_01_sfnt_off0000f889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF889 11004 bytes
SHA-256: 6e1877b58c0d2e33416a64ca35dc1f53bb27a4afddeb18ca6b12fbf07a55c52e

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