Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c65161b580db8e…

MALICIOUS

PDF

123.3 KB Created: 2020-11-30 20:46:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 48f23ec76c03cb12b04bf794fede08e4 SHA-1: db72cf33d447b86552f38db090420e30098807ce SHA-256: a3c65161b580db8e428556875ef705cdf80002a892362370b377b3c78ce25fca
154 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 routes users through malicious redirector infrastructure. 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-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.
  • 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://ggtraff.ru/strik?utm_term=2005+acura+rl+manual+transmission In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f877460be94c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503050/normal_5fc4944bd15d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5f951ea12cac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fba600a4ff4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451021/normal_5fa5b506799ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487623/normal_5fc22b333fc5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447086/normal_5f9d672a3d1d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f8a028256604.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe08425147b14804f9d138/1606289479505/voditazigovuvelewibunumun.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/14886726554.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/john_locke_impact_on_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/cambridge_igcse_chemistry_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/hamster_for_sale_craigslist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc8e2ff-224d-422e-97be-f8a0cd748f6f/luxavifajamagupalibik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DB5 6616 bytes
SHA-256: ac3c24abcf6e621ea3ef775b03765b4d2132bc9512bf39e5bb9bfd5ce0be3322
font_01_sfnt_off0001a488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A488 5248 bytes
SHA-256: bbfa619da70aa336a689a10a73e0fda413170bcf28a3d4a2e14dafff4765b127
font_02_sfnt_off0001b64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B64A 12696 bytes
SHA-256: c054366cf72634ce18abcff2ef4b31ff7abcbf6aaade84911363d2984d352c53

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