Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b3e5481643930f…

MALICIOUS

PDF

72.2 KB Created: 2021-02-22 13:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ca0006cde3af4927a2d14a384654ef86 SHA-1: 4a95b23efb32307f87438b97e9a47488c381dacd SHA-256: d2b3e5481643930fb005072768482e9f2dcc84bbe630e3ea363f9aaacaae7334
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms or phishing lures. The document body, though heavily corrupted, suggests a lure related to technical support or troubleshooting. The presence of multiple external URIs and a high ML classifier score indicate malicious intent, likely to redirect users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://crophysi.ru/123?utm_term=how+to+fix+echo+on+vizio+sound+bar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392661/normal_601fd3ad29acd.pdfIn PDF document text
    • https://cdn.sqhk.co/gejemizus/5gjYibs/94969259604.pdfIn PDF document text
    • https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/337850.pdfIn PDF document text
    • https://kegalanomer.weebly.com/uploads/1/3/1/8/131856310/padulib.pdfIn PDF document text
    • http://labiluwewinedu.22web.org/airline_commander_apk_mod_data.pdfIn PDF document text
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/1751983.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/214396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426267/normal_5ff4a9e6cfcbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_601e7879752cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifilumiteva.epizy.com/45243276330.pdfIn PDF document text
    • http://pitowurojagit.epizy.com/immigration_uk_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/32025060227.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/teferufavid.pdfIn PDF document text
    • http://pavasokunise.epizy.com/xeroziwalonadiwan.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/absent_line_number_information_mockito.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/lixusobewatu.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_off0000de7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7F 5448 bytes
SHA-256: 555c579f953ffebfaa339b08ff5363ad4b104930d0a0fd99a5e3585dd86ca65b
font_01_sfnt_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 10092 bytes
SHA-256: b621cdaa3f0716f614ffccf884b02aa53193b7fdf1724408ce8945d73cfccc2c

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