Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4870dcf0f59b64…

MALICIOUS

PDF

72.6 KB Created: 2021-06-12 11:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b83d8c97b05bf38121bd057e63776437 SHA-1: 3dc8462f6a07ea5de48f12acc00508153046c7e0 SHA-256: fb4870dcf0f59b64cbf043ba200684d84370d41b0620b5a17cda267f842b247a
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'synerhu.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body contains garbled text, but the presence of the URL and the overall detection profile strongly suggest a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://synerhu.ru/pbw?utm_term=soolamangalam+sisters+kandha+sashti+kavasam PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4451567/normal_60b5c5696a34f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fef69057eb13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443819/normal_5fd06b61918f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5ff18105ee647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5fcd098431d76.pdfIn PDF document text
    • https://gabijuwi.weebly.com/uploads/1/3/1/8/131871583/nusanabapolo.pdfIn PDF document text
    • https://sejimewopokotas.weebly.com/uploads/1/3/5/3/135350214/ratefi-wuzubena.pdfIn PDF document text
    • https://vomuzubedabop.weebly.com/uploads/1/3/0/9/130969103/fe7067fbaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funesut.pbworks.com/w/file/fetch/144558126/nagaxolujozijixavubanak.pdfIn PDF document text
    • http://kejufavo.pbworks.com/f/tegogabewemozumit.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144612753/91148619499.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/goxezolapijowoninukot.pdfIn PDF document text
    • http://banusiv.pbworks.com/f/kitaaba_barataa_afaan_oromoo_kutaa_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9dee68c-39e4-4941-a114-37592d8e509f/26049852083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34454d8-cb83-4414-8449-7ac56ae168eb/22328982539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df403f7-9cf9-4af3-ad1b-dc3ac6e409bc/gluten_free_vegan_junk_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4733a4e-6ccf-413c-9652-f6e834081a19/how_to_calculate_irr_when_npv_is_zero.pdfIn PDF document text
    • http://pefumugat.pbworks.com/w/file/fetch/144539286/nonton_boss_and_me_eps_30_sub_indo.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/f/gemivufobodiz.pdfIn PDF document text
    • http://demopefo.pbworks.com/w/file/fetch/144527982/eset_nod32_username_and_password_eav.pdfIn PDF document text
    • http://nubuzefi.pbworks.com/w/file/fetch/145082226/nofifiwetol.pdfIn PDF document text
    • http://nibenaxibot.pbworks.com/f/72503971738.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_off0000de93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE93 5468 bytes
SHA-256: 4fd3f6f607e4ddfc7555ce96b35aa9b33bfcd8b5d8031d74140be30065f21a4c
font_01_sfnt_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 10504 bytes
SHA-256: 3320d98c3aa5bbaf6e7c8565221409ffe044f26d45d905926d549482b3532cd7

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