Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e9874e69950c84…

MALICIOUS

PDF

68.4 KB Created: 2021-02-20 18:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 04678d13df1d6eab8ff589b697344d32 SHA-1: 7fc74728ecdb448be88ae47e7d1cdb84bc906f03 SHA-256: 73e9874e69950c84ee1c4fd535c358a172506f8621fc90701295ed3d9fdacdda
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=fountas+and+pinnell+sight+words+1st+grade In PDF document text
    • https://lidutefavova.weebly.com/uploads/1/3/4/0/134012516/cc928.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/zizidipamamodof-zanazer-wabanazakilo-sesudakepapupi.pdfIn PDF document text
    • http://noverst.xyz/social_media_marketing_for_dummies_bookdj271.pdfIn PDF document text
    • https://pibezenasa.weebly.com/uploads/1/3/1/4/131454503/dc69306.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/vekenaxijafab.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/oT7Ehjr/amazing_deals_inc.pdfIn PDF document text
    • http://onatural.space/microeconomics_class_12_cbseakx4b.pdfIn PDF document text
    • https://lizitizesibegip.weebly.com/uploads/1/3/4/6/134685526/pobog-soluvogoguvu-banebu-bivazokixixeve.pdfIn PDF document text
    • http://tibetterrier.ru/tikunuwekuz61eu.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/ANihfgg/79865764800.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/ghfFiaf/zekasubu.pdfIn PDF document text
    • http://umkatrade.ru/806344433386sg2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lomuper/gifapiwuleloxodolupazenu.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/hcl_technologies_annual_report_2018-_19.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_off0000c2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FB 5200 bytes
SHA-256: 124257ef90e9cac54e3cde439febcff929da8363a5b2198cc9255d37cc34b39a
font_01_sfnt_off0000d4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BA 9856 bytes
SHA-256: d19606502b940d18213ac2d0b6b56d755de0cae3be1e4052d157fb3bfdb62e5c
font_02_sfnt_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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