Malicious PDF — malware analysis report

Static analysis result for SHA-256 55cfdcb363c99e7c…

MALICIOUS

PDF

68.8 KB Created: 2021-02-28 11:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 21f90bedfdb9ee4471e7aa43310e2e29 SHA-1: 87c305383efba5c5cec1740e5b2ba075b92be5c1 SHA-256: 55cfdcb363c99e7cf63cc4fc25523d1ef1af47aa281f43fa305133ae4f6a0d51
196 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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=premier+pro+series+oven+manual PDF link annotation
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/0999a2bf7c.pdfIn PDF document text
    • https://sanijala.weebly.com/uploads/1/3/4/8/134889677/wenixuk-parawiki-tuvexe-belutiti.pdfIn PDF document text
    • https://gajamonorafu.weebly.com/uploads/1/3/5/3/135389334/jajofakimum.pdfIn PDF document text
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/804205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459621/normal_5feb756d94f56.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/jmhgab9/84501631065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405202/normal_5fe04556935b5.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/2c0fb7b25f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_602e2c8fae8fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501356/normal_60283fd140670.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/remington_700_recall_serial_number_lookupor4de.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/gutiz.pdfIn PDF document text
    • https://sanorasawuvut.weebly.com/uploads/1/3/0/7/130738762/vabime.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/da53853e.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/budovewesekaz/picture_quiz_logos_answers_level_32.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/90023427999.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/noxipuramusolovigeviri.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/gate_2018_instrumentation_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/31232481721.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_off0000d278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD278 5024 bytes
SHA-256: 0f7772fcfd23e35108debd9bb285c2ce76f19f5e240368d22f7698fad8013b84
font_01_sfnt_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 10068 bytes
SHA-256: 7df7fb41c604f076ca5b903762623a3cbb0f349544fc5656dae9db5187f3a0d2

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