Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e766af645b199a…

MALICIOUS

PDF

78.8 KB Created: 2021-06-07 21:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f64b5a50a86f368b6dbf673430ec17c4 SHA-1: ecb65c53f083cd4708f80c7341e6f23950baf88d SHA-256: e5e766af645b199a25f6b552734bf968bea1e804cb5c35dff16a6ede1e2ccb56
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics as malicious, including a link farm on disposable hosting and a high ML score. The embedded URLs point to suspicious domains, with one specifically identified as a link farm. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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://lozipotod.ru/123?utm_term=guidecraft+grippies+stackers PDF link annotation
    • https://finibolamojirum.weebly.com/uploads/1/3/5/3/135341575/4f5af240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416923/normal_5ff991d344ac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_600f871e84af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_604e6a3ea1dbc.pdfIn PDF document text
    • https://besivopu.weebly.com/uploads/1/3/4/7/134705308/55f489b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_60148fd6a63df.pdfIn PDF document text
    • https://vopovotapo.weebly.com/uploads/1/3/5/3/135324672/jegapirosuxepumanad.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4374366/normal_60b2528142a7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f6b67bf5-31c7-46a2-81be-5f332974903c/true_metrix_blood_glucose_test_strips_uk.pdfIn PDF document text
    • http://mutatalibo.pbworks.com/f/sony_xplod_52wx4_owners_manual.pdfIn PDF document text
    • http://jopamedet.pbworks.com/f/kujerujidamodo.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/w/file/fetch/144627411/travel_brochure_planning_sheet_ks2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24bb42f-b6df-4ada-8ce4-7e16dc0c4da4/rasebatomukopodegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df59de1f-bad1-4ebf-8086-d3335db20aed/how_much_is_my_antique_furniture_worth.pdfIn PDF document text
    • http://xemeganavon.pbworks.com/w/file/fetch/144772221/54262055132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b7b9c5-5c8f-4c41-bf32-f6b818ee9dbe/tutorialspoint_css_editor.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144678561/pdf_to_word_converter_free_download_online_i_love.pdfIn PDF document text
    • http://sejiliki.pbworks.com/f/ford_escort_mk1_felgen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d47fcdf-1641-4837-a334-72b647284d94/29301942399.pdfIn PDF document text
    • http://misabovu.pbworks.com/w/file/fetch/144546591/walmart_cash_register_training_video.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB93 5052 bytes
SHA-256: a505c5008ec452c442ccd3583021487dd49939090a4123ade086078798dc5e12
font_01_sfnt_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 16100 bytes
SHA-256: e80ff6790645c6c6e177ebff1efd2786c178812e62f70b01683e788a38da3ac4
font_02_sfnt_off00011de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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