Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdaaf1f7776e7112…

MALICIOUS

PDF

71.9 KB Created: 2021-03-03 01:15:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d1f716c2db0e5badf8b01983d89ba996 SHA-1: 8ddfe1935f1eb25a0c081e08e95fe81f5538186b SHA-256: bdaaf1f7776e7112537e45b861f8abe9aba0aae4591dcbfa3379eb77819fa0c3
126 Risk Score

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 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.
  • 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://jottigo.ru/wix?keyword=molarity+worksheet+%25231 PDF link annotation
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/fc747ed7a4.pdfIn PDF document text
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/mojomuzewofifi_wifiboxoxurizo_menakagelofuwaw.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/2549519.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulitaweluf.rf.gd/72240118134.pdfIn PDF document text
    • http://pezedavepajizum.rf.gd/tonerapuri.pdfIn PDF document text
    • http://tufukupetateto.epizy.com/15298443240.pdfIn PDF document text
    • http://sikofus.epizy.com/80736184397.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/37596723943.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/accountant_cv_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/critical_thinking_skills_formative_assessment.pdfIn PDF document text
    • http://watimesuw.rf.gd/guided_reading_activity_8-_1_world_geography.pdfIn PDF document text
    • http://wijopimitiraze.epizy.com/8177182058.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_off0000deb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 5036 bytes
SHA-256: b7c946ba4635519f81a2d7bb2efa2d5131e8cc80f29244e81d7832ceee0fa3ec
font_01_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 10228 bytes
SHA-256: eed0f67d0a4328d86cc8f414906803ff419f98d4be8629eb789f50b390aae96e