Malicious PDF — malware analysis report

Static analysis result for SHA-256 218b05a32cbf7bcc…

MALICIOUS

PDF

196.7 KB Created: 2021-03-19 04:12:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 999928827de3eb56f6a39bd2a1ef6bf0 SHA-1: 77ba48dbb4754a77786add6d2bd1271a6b719dbb SHA-256: 218b05a32cbf7bcccac0bcfcc4f054adab017b178e2d72188b4d6de61d67aaf6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or phish for credentials.

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://nipisod.ru/strik?utm_term=carl+sagan+cosmos+intro+quote
    • http://rotawafuwuno.scienceontheweb.net/23253629521.pdf
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/2712915.pdf
    • https://cdn.sqhk.co/sawibevas/iiihjo4/46440434307.pdf
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/vedajaman.pdf
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/ganejumeduta.pdf
    • http://nitesufi.sportsontheweb.net/28252809961.pdf
    • https://cdn.sqhk.co/rizakumer/ouhjiib/robert_putnam_bowling_alone.pdf
    • http://cosmicgig.com/niwononekemomepofozax8ajmx.pdf
    • https://cdn.sqhk.co/xamizine/rib6WAJ/neutralizer_app_instructions.pdf
    • http://reduslimitalia.site/85131146757pxnqu.pdf
    • https://cdn.sqhk.co/fomolunuvufa/cje5hgJ/dubevixetomemijuso.pdf
    • http://gobitujesan.scienceontheweb.net/wujozefi.pdf
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdf
    • https://lifezudo.weebly.com/uploads/1/3/0/7/130739479/mebovuwatule_rirani_zutejoxob_burubagizudozas.pdf
    • http://clientbluebadge.com/what_does_ti_amo_mean_in_englishvnmhy.pdf
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/mogenefawekabup_vurakiwifomugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_dd31ba7f68f3498a9016cc3771e40a5b.pdf?index=true
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_23a9c7e30ce94712ba6b1c0f6f3d48b3.pdf?index=true
    • http://gixiluvigatekij.atwebpages.com/interior_design_sales_jobs_chicago.pdf
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_e7f9c6e36c054e6b8b28ed8e779e7a40.pdf?index=true
    • https://9a86171b-24d8-4f43-8717-687e75280c8f.filesusr.com/ugd/6234e8_fe2c4e7eba654ba39e51cc3f558651fa.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_off0002ca9e.bin
434b398eb7330085d6ca26ca11ff18a178af98ca5e8f33abfbe21ad62f3197ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA9E 5148 bytes
font_01_sfnt_off0002dc07.bin
1ec7641f47763ee8608a0e810fcd4a36e5c5225731c9a31bb553466b1fcdef40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC07 11940 bytes

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