Malicious PDF — malware analysis report

Static analysis result for SHA-256 16138370de1c5359…

MALICIOUS

PDF

83.1 KB Created: 2021-04-07 23:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 05d36b543876e10564a7b812bfa33f0c SHA-1: eb5466a4c3c7e75256ec1cbf84e0f03370de41cb SHA-256: 16138370de1c5359f5b84c81edf411dbcd6bdf1f103998a15ce858efb57e4ea1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan attempt. It contains numerous embedded URLs, with a primary focus on directing users to `https://maypoin.ru/123?utm_term=mobile+landing+page+template+html`, likely to host a malicious payload or phishing page. The PDF's structure and the presence of external URIs suggest an attempt to exploit user trust by masquerading as a legitimate resource.

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://maypoin.ru/123?utm_term=mobile+landing+page+template+html PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427506/normal_60043e1cf3e4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_606cc73d7630b.pdfIn PDF document text
    • http://getubij.66ghz.com/ligomovi.pdfIn PDF document text
    • http://mejebeputiwo.22web.org/tojavorinurejawefumudetur.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/troya_homero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_5fe69cd9132a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480581/normal_601935f057efb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_5ffe7d4c7f57d.pdfIn PDF document text
    • http://meweremidef.iblogger.org/tufesesifalolutoxigazepab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_606647309ae71.pdfIn PDF document text
    • http://felagem.getenjoyment.net/was_in_the_heights_on_broadway.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/ba905438-2b59-49fb-81fd-a8f457b84d1f/norton_anthology_of_english_literature_volume_2.pdfIn PDF document text
    • http://demevobofimozu.epizy.com/short_stories_in_english_for_students_of_class_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487ef4b4-5430-4c8b-b6d2-1b00811d858a/world_political_map_outline_free_download.pdfIn PDF document text
    • http://mawigugu.rf.gd/fatf_terrorist_financing_typologies_report.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/67532710108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfc32c5-0a63-445a-bf87-2fc89d1c5b0a/44029897266.pdfIn PDF document text
    • http://movuveso.rf.gd/febewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe0a3a7-80fc-4a5d-8a72-376457ae285f/which_of_the_following_is_true_about_multinational_corporations.pdfIn PDF document text
    • http://bujozedaworora.epizy.com/kovem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f9d2e2-e4f9-467c-bc51-3e285a3ff0fb/61660207697.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_off00010844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10844 5244 bytes
SHA-256: f8658dfe823088b15ad460b5f3cfd82a2abb9fc5920b532b65c190cbba0692f8
font_01_sfnt_off000119ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FF 11000 bytes
SHA-256: 94bd65226e3ddbdb7be4646edaaf67aa96b25e10a286594b1442ca0116b22f22

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