Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba0b944dddc8cf5…

MALICIOUS

PDF

61.8 KB Created: 2021-02-11 15:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3a4efa2c07ea59a9b8515c26c4721b11 SHA-1: a45b39e53024d84e7e8982dfdde3aaf6f8fe3421 SHA-256: dba0b944dddc8cf56b09685635a398214f20aee9ef49806e307009f6cab450da
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=amanita+design+games+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372983/normal_5ffb24cb8a91a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444864/normal_600d8ff759034.pdfIn PDF document text
    • https://memebewaliz.weebly.com/uploads/1/3/0/7/130775997/8755290.pdfIn PDF document text
    • https://natapoja.weebly.com/uploads/1/3/0/8/130813782/d08e2b684438405.pdfIn PDF document text
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/zanarelibejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5ff8a92510637.pdfIn PDF document text
    • https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/lisoleroviteneruzib.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/3455348.pdfIn PDF document text
    • https://gowobokibisalo.weebly.com/uploads/1/3/0/9/130969305/a2492260.pdfIn PDF document text
    • https://nazuvunu.weebly.com/uploads/1/3/4/4/134438845/7306606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_6020884283f1b.pdfIn PDF document text
    • http://leafester.online/mavorilofuxojibojunilunm61sl.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/pusolefosex/86659062045.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/51000076445.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/kendo_spreadsheet_freeze_row.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/coloring_sheets_printable_letter_h.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/certificado_de_preparatoria_abierta.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/muscle_hypertrophy_workout.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_off0000b81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81B 5204 bytes
SHA-256: 8fbff906146b6cf65354b22a480e61b128c5f62241b2d0ad456aae39fbdbb676
font_01_sfnt_off0000c9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C3 9596 bytes
SHA-256: 61161c4af6c8d3d9b55212d4a913605c308e78074816782e3a70289ffb1c2b51

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