Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d415b213f7b4f7…

MALICIOUS

PDF

89.1 KB Created: 2020-12-19 12:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 141675a511ff08c21f0d737b0abc54a2 SHA-1: 753f73b93d77c7bc51ececb3991105231f4c9650 SHA-256: a2d415b213f7b4f7f68f7bdb5777fc263c2d315420ba2899b36d9a362fa5deee
162 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection. The document body, though heavily obfuscated, contains text suggesting urgency, aligning with phishing lures. The ML classifier also strongly flagged this PDF as malicious.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffine.ru/aws?utm_term=anaganaga+oka+vullo+song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463830/normal_5fbe64b655319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368762/normal_5fc8468d9bc97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450148/normal_5fa67d5395afd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fca6e7c6832f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_5faa6fa338dd6.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/mesixadelomomo/befulurepetexilomej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6445fa3bf4b14abcdaac2/t/5fc749c109f4d56e8f827ac3/1606896065828/sovifefid.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/jquery_validate_disable_form_submit.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/milli_savunma_bakanl_bedelli_askerlik_bavuru_formu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/40612900652.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/boxazedogukusovu.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/sussex_tech_georgetown_delaware.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/sawij.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/ffxiv_dungeons_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51111239b0722914c12ae/t/5fc82ff3b74dd54858cf4295/1606954996692/xitavazojezelekusepojimak.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/48603437475.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_off00011cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBD 4872 bytes
SHA-256: e0cdcb1bf93c1a0388b18d150b87f402e03c4e91345d1fb638a6394fb2f6ee47
font_01_sfnt_off00012d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D71 12760 bytes
SHA-256: 99897e3577a8aad869e37384b90c4a627085d50fcbbfb03293f25dfbf130ec17

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