Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2108d71a07f025…

MALICIOUS

PDF

47.4 KB Created: 2020-11-09 09:07:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a271c241bc98b2a2a1a42d82155628fe SHA-1: 93dffdaf142b4d5bbe8bc82518c390d5032caa80 SHA-256: cb2108d71a07f025bb477fcd67282129b06d898dd86e6b5842c0a82d37c71f09
84 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/aws?keyword=2005+whirlpool+gold+refrigerator+manual PDF link annotation
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/1614702.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/daxatipafo-xoribuxu-duwagopegodot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2692a078-aa83-456d-aea9-1b02d8e1909e/.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/98407041106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/211de1fe-67ad-4010-85e7-fa7af2d0ecdd/xojulijezura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6123b38d-ef87-4e4b-bb44-01dd515c5a75/83255258201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b16a2a-2caf-447e-bf26-41e91b695828/jimmy_kimmel_boycott.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35342c0c-4bda-440e-a476-93e8577cff2f/31465576660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592c66ba-77f7-497e-95dd-458ff1c066a8/2758474295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5206c870-614c-45bf-a6c6-678b5ab34ce4/basit_kasa_defteri_rnei.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.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_off000077ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EF 5672 bytes
SHA-256: 9cdf8b9941d1fe7b24f0abc163e49129d23a321ff79d68ec9e2117693f2b1e71
font_01_sfnt_off00008b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B27 11020 bytes
SHA-256: f0c30e3fc5e630a68c420dcc00e9685346484f3f1bb234618ad9eb7398513e1c