Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4808af95939e68c…

MALICIOUS

PDF

76.7 KB Created: 2021-05-11 04:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3ee2f41072da7791a896f82edfdc5b0b SHA-1: fd44aa07e769f90a59f434683254c708e3493b75 SHA-256: a4808af95939e68cebb04362ed97ffe7567cb0df4533804e1b9e53264502e8dd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=how+to+practice+art+fundamentals PDF link annotation
    • https://cdn.sqhk.co/kibedutej/f3jeV6R/89645903735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_6019118180b74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_603ef1e1d7433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_602c9e1bca4cd.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/aggjcfX/rapidex_book_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_60513c4674d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_600cb0c084d55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/96600626205.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/digodulebala.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/midema.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/bumol.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/994762578.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/12679084654.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/vomisawite.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/45504361163.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/lupakovijogos.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/nagaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/free_template_html_bootstrap.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/nejusu.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/lopuwedazuxuruzugofabuxo.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_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 5356 bytes
SHA-256: ba11520fc276b16f0f614bac789c2853de08f58c9bfb269b1ba7bf932edf3542
font_01_sfnt_off0000fff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 11088 bytes
SHA-256: 37f18804f0991248d712afb8953bdf37945f1641f63522006632ab0789b0bce8

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