Malicious PDF — malware analysis report

Static analysis result for SHA-256 71eb4b38c7c3a64d…

MALICIOUS

PDF

69.7 KB Created: 2021-02-17 09:32:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dccec6e45253c6d79aa79bcdb5d8d07b SHA-1: 79751194fc51be60a014b37e6a451185b9f01ac5 SHA-256: 71eb4b38c7c3a64daa05b87f3085b8772988d89d8b18c94114f96ca3f2c006a3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=2019+and+2020+broward+county+school+calendar+printable PDF link annotation
    • https://cdn.sqhk.co/girolivudafo/7fMjQZg/dejovotokir.pdfIn PDF document text
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/rotom-tamatevisolet-dapaxegogef-zerotijisotagu.pdfIn PDF document text
    • https://rimenedefogifu.weebly.com/uploads/1/3/4/4/134466040/1294881.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/hajc7jd/69797379653.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/juwofuxufijup/newilovezakuxek.pdfIn PDF document text
    • http://bijaxufima.epizy.com/lugesagetoles.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/4564447690.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/alarm_ringtone_god_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/descargar_diccionario_biblico_catolico.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/4826185183.pdfIn PDF document text
    • http://mevonaku.rf.gd/rezuparakepivowarorim.pdfIn PDF document text
    • http://meduzifovum.epizy.com/soviet_union_anthem_piano_sheet_music.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_off0000d279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD279 5884 bytes
SHA-256: 9786d47d4556bdec3f05041ad09a199908aaa209f2cfa358ae0272c88e5198f1
font_01_sfnt_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 10232 bytes
SHA-256: 3dfd064d76a3c6bb37472e399213d534310c9bda4528e854e4874bb82c7d443b

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