Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7587af9a138682…

MALICIOUS

PDF

75.5 KB Created: 2021-06-05 01:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ae986f3028457d5da721ef9e3c8e52f8 SHA-1: 4a598f0129d2a848b4606057a46af269e6c05613 SHA-256: 4e7587af9a138682348a23bcc7be314748972df8d54dcb5628cde1c57a170263
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website related to ankle rehabilitation, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the presence of an external URI and the overall malicious classification suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/pbw?utm_term=how+to+rehabilitate+a+fractured+ankle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5ff872dd13b11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_60689889614f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449192/normal_6061faf0d61c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_602f5b573774c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390323/normal_606cbceae18da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_6057cd70c1d48.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4425506/normal_60b0bfe8ec445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470960/normal_606ca96b08c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_6038fc5f1baaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_603115376be35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fff5bbfa6301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418587/normal_5fe459fe8ec19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501479/normal_602240f59b1c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_6027a3054338e.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4410433/normal_60b752015c188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390374/normal_5ff7128ed16c8.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/fe67a92e-942f-45ae-ab7f-630e32006c1c/tp-link_av1000_powerline_wifi_extender_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48aba1dc-fe68-4674-97f5-2d099654d97f/when_did_school_end_in_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e068d014-d293-485c-ae81-01edaf2c61a7/craftsman_25cc_leaf_blower_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d9415c-58b4-43a2-a422-a7dd74f872eb/12638184273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5e1ad6-0b16-4971-8b4c-1a2dfe5cc1b5/how_much_does_database_administrators_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6294cda6-f69f-468b-a5f0-c664a14ab4aa/what_was_the_magna_carta_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb320019-a0e8-44c8-a114-1a203e80b852/how_to_solve_pedigree_probability_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b3d783-555d-46d3-b564-e3557a1e2a0c/miwonen.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_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 5188 bytes
SHA-256: 3984176d4fb9fd99667071099fe745c8418aca1c13a580f706b354f6ce9cf583
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 10960 bytes
SHA-256: c41bac84f724f73309ffcc83742648cefc6d2a280bf0e6f4d14a99452b5a9263

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