Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cd9aa69cc07ce3…

MALICIOUS

PDF

80.8 KB Created: 2021-01-07 22:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a76e6e94d86b188f16d0d2653aa0aa2b SHA-1: 73fc9df9fd77c2f5c3f4e7fafd038e7172bb2504 SHA-256: 41cd9aa69cc07ce323d3c6ab92f855064d8d0515dea8235b4fd2bcf85e0f4199
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, suggesting a link farm or redirection to malicious sites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a potential for exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffset.ru/aws?utm_term=sample+survey+analysis+report+pdf PDF link annotation
    • https://nozusetemakofam.weebly.com/uploads/1/3/1/4/131408546/5787878.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/gGtZRib/happy_bike_stunt_on_wheels_madalin.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/RBibwjg/fruity_unicorn_slush_maker_slushy_drinks_cooking_light.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/hjpig1V/alien_blackout_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bimazizuxu/zhe7Ljj/60030591175.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/TUudPa2/mokimifepexuwado.pdfIn PDF document text
    • https://xajekedifa.weebly.com/uploads/1/3/4/4/134469171/tixefamugugijudaj.pdfIn PDF document text
    • https://tovegema.weebly.com/uploads/1/3/4/5/134505564/b1ef5f2c1c6d18.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/vawesaviwotab.pdfIn PDF document text
    • https://tazirive.weebly.com/uploads/1/3/0/9/130969887/5636911.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/zgggdG0/ny_stock_market_opening_time.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/jopomodilamego/61985219992.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/22855904922.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/bozasemajevibapogizef.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_off0000ff48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 5452 bytes
SHA-256: 24af8896b9c38bc93cc93be7f2740b8f002bf16eb017fea54342fd75a0b633cf
font_01_sfnt_off000111c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C8 10864 bytes
SHA-256: be8094b89e0a56a8fe27d6dba5a876d4f8153769f82ea00e5df2d16db981ae5e

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