Malicious PDF — malware analysis report

Static analysis result for SHA-256 4208336047b8f6d7…

MALICIOUS

PDF

103.5 KB Created: 2020-11-21 17:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 80656fdfbcd845915f30a04503a4c288 SHA-1: 9b3f4af54762ec354e8282ba6b02912d1a5cf714 SHA-256: 4208336047b8f6d760f233a1e66331c9c371d530e701d9742ca23799ea11dbe4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 0.9987

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?utm_term=dragon+ball+dokkan+battle+apk+mod+4.8.5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fafbeb10a199.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/f6b9193d1f016.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/66666e4d6f5.pdfIn PDF document text
    • https://nigiseza.weebly.com/uploads/1/3/4/4/134462574/b96f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f8e79d11605d.pdfIn PDF document text
    • https://titamifafipife.weebly.com/uploads/1/3/4/3/134315234/buvenasilodarabezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402724/normal_5fb2a28a69196.pdfIn PDF document text
    • https://judikojegewag.weebly.com/uploads/1/3/4/5/134583508/a9489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_5f90c1b1a9b3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a5fd7e-adc0-4cff-91be-b717faac8cd0/17388020675.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/59928561543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce62a1c-d9b5-4044-a112-a94cd2147be6/6151795322.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/sovasit.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/powoxowelaratedowevefek.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/84541811648.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/sugegibode.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 2920 bytes
SHA-256: aa3768bd76297dd2a3cca00e2a89df47fef7e3ee0de5124f994a580b739fd44f
font_01_sfnt_off00011f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 5740 bytes
SHA-256: 33aaa627e3662da717bb456cd67676e06efd6dd10d89cec7dfa20ffff3cc45b3
font_02_sfnt_off00013280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13280 6392 bytes
SHA-256: f51faa2195e75417501033f8a9e4712207e10105a0a196a54a135aa7f18d602a
font_03_sfnt_off0001453b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453B 13320 bytes
SHA-256: 21caa57bb26174eac923997695137bf26894ec6b1d96130fbc8372d252e1754e
font_04_sfnt_off00016fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FAB 17372 bytes
SHA-256: 7c9e9252d9ddb5fa08b422bed6fbbcc9a5a58d08100b98895f6adf21902d1adc
font_05_sfnt_off00018755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18755 1736 bytes
SHA-256: f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6

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