Malicious PDF — malware analysis report

Static analysis result for SHA-256 90efdcd1eac6a909…

MALICIOUS

PDF

68.8 KB Created: 2021-02-16 18:36:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ad7ec2c636430dfa23781c85addda6b4 SHA-1: 81953f7477c76c88663b98d930b318e571d2db4e SHA-256: 90efdcd1eac6a909c6b4c04e40e6d7306632dff60acc9487da62579ab19a4ea4
184 Risk Score

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.
  • 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=fishing+manual+pdf In PDF document text
    • http://rowokalasi.iblogger.org/32707670016.pdfIn PDF document text
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/lividevebodezes.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/3198345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454289/normal_5ffc68cde48c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_6003a68f7229c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_601331fbb9ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484990/normal_60144844d3c68.pdfIn PDF document text
    • http://detobusukited.iblogger.org/3558996796.pdfIn PDF document text
    • https://tuzakipimuvujuv.weebly.com/uploads/1/3/0/8/130813756/62d5b6ad2d7edf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454808/normal_5ff9a7552392d.pdfIn PDF document text
    • https://xukotonaxi.weebly.com/uploads/1/3/1/4/131453431/9032837.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/3732295.pdfIn PDF document text
    • http://gozatelaji.22web.org/xofiwiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wosakev.epizy.com/add_subtract_polynomials_worksheet.pdfIn PDF document text
    • http://tizedukef.epizy.com/98981746121.pdfIn PDF document text
    • http://roramebojasaw.epizy.com/regus.pdfIn PDF document text
    • http://mezotake.epizy.com/kunejiwedina.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_off0000d183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD183 5312 bytes
SHA-256: 86b549383518494607fb7440fb07250d5403540998078db1b92dcf138d94b63d
font_01_sfnt_off0000e376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 10080 bytes
SHA-256: bde01bd4c708da8321b91113401ab7bc8b40498626a654e2d86c3dda6680da31