Malicious PDF — malware analysis report

Static analysis result for SHA-256 b883c858791eff19…

MALICIOUS

PDF

80.5 KB Created: 2021-04-15 20:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f49f9c36afb12c8d06d113e49eaf7dfa SHA-1: 4b26406b0dd6d8ba26d2b52d88e837dd7edceea7 SHA-256: b883c858791eff19700572237a7fdad0dd97493190084d0afe1b01e3b8ce5f3c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'George's marvellous medicine grandma quotes'. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=george%2527s+marvellous+medicine+grandma+quotes
    • https://cdn-cms.f-static.net/uploads/4393521/normal_60635059bf8f6.pdf
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fc729ad26b58.pdf
    • https://static.s123-cdn-static.com/uploads/4450347/normal_5fee9f868887b.pdf
    • http://silujokiz.mypressonline.com/punezufas.pdf
    • https://cdn-cms.f-static.net/uploads/4377388/normal_603ecef92745b.pdf
    • http://nopotaz.medianewsonline.com/assurance_and_insurance.pdf
    • http://jukojadijomefar.medianewsonline.com/estrategias_de_marketing_digital.pdf
    • http://kononameve.mywebcommunity.org/best_ebook_reader_app.pdf
    • https://cdn-cms.f-static.net/uploads/4494166/normal_60228d1e0684c.pdf
    • https://cdn-cms.f-static.net/uploads/4401525/normal_6049e6b8d59f3.pdf
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5ffea465a3545.pdf
    • http://zakosemej.mypressonline.com/xenoluro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c66d57fd-c940-4687-a751-c450e8bcb99b/tunepoxixogovudizunafemem.pdf
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_f7a81f77a84f45059c367653a2e7ad9d.pdf?index=true
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_34f0016a7cff45a28496cb7f7a6ccb97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3b226edf-fe6c-4ffe-b933-cc9965be3c82/34618355507.pdf
    • https://uploads.strikinglycdn.com/files/ac27d6d7-6528-40ab-a2f9-49e952e2ae0a/canon_mp11dx_paper_wont_feed.pdf
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_8520435c59c6482299778c06bcb945ff.pdf?index=true
    • http://likutolejit.onlinewebshop.net/they_say_i_say_download.pdf
    • https://uploads.strikinglycdn.com/files/a0408868-cf96-4a98-a535-f749f4ac8638/46262006662.pdf
    • https://uploads.strikinglycdn.com/files/558b672e-ec13-4a11-af8c-1f7dc6e461fb/terekaw.pdf
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_32e88fc629294cc79dae84a7360e9fe5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb53.bin
0f5be84ccf6eac047ecaebbb11c7779992130316e9478a3bde2bc351e614c953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB53 5508 bytes
font_01_sfnt_off00010dfe.bin
78743ade6f2ee238d1173ef201724b7249e6136c0849a31e195fbf9e4e988aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFE 11236 bytes

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