Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e19cfeb4fe3c32…

MALICIOUS

PDF

76.5 KB Created: 2021-03-13 22:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 59126eeb7f735f1a0f42ebdd19f83402 SHA-1: aea6aba59368fa1f9840569b91de9556d67d8b31 SHA-256: 49e19cfeb4fe3c32fc750bcc8ee8530b47fcbcadf7ee78362a987e5743e44646
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 numerous embedded URLs, with a prominent one pointing to 'xajibur.ru'. The document body, though heavily obfuscated, appears to reference a musical cast list, suggesting a lure to disguise the malicious intent. The presence of multiple disposable hosting links further supports a phishing or malware distribution campaign.

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://xajibur.ru/strik?utm_term=wunder+von+bern+musical+besetzung PDF link annotation
    • https://metazavog.weebly.com/uploads/1/3/4/6/134650383/xizifukexifot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383444/normal_6008166da8c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_5fe653ee680a1.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/ii8jfgp/47201709480.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/fdbed6ddbb5a2.pdfIn PDF document text
    • https://lewaxirilukuxod.weebly.com/uploads/1/3/0/8/130813115/polosunofifilosu.pdfIn PDF document text
    • http://zujuzerawijuk.medianewsonline.com/99927478892.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/idtkdBl/24857052502.pdfIn PDF document text
    • http://gamokidawenikon.iblogger.org/1685860404.pdfIn PDF document text
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/b74428abcceb23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385853/normal_5fe505570c7b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bewomad.rf.gd/vikogezesakoxubiwukodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8de014-c574-44fb-bde9-8923a89e2814/moniturabirumelotawebiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb01b2a-4cd0-41db-bb10-e322b1b275bd/insinkerator_evolution_parts_list.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/kaworalimitakobekoju.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_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 5520 bytes
SHA-256: 68d24f765f3da6d8e990ca797ebfd013a66b97dd29dc4f6307e352a08109c131
font_01_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 11844 bytes
SHA-256: 1f384941f368f9a55bce9c2200a18cd5c700d059e71fed10049497193878ee53

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