Malicious PDF — malware analysis report

Static analysis result for SHA-256 900c8fca2bdbdd75…

MALICIOUS

PDF

72.9 KB Created: 2021-03-03 23:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 63f9a32777df0eadffdd1f430adbbfed SHA-1: 8e5acb5ed4ee1b3590a2e96cb54cdd70573908d4 SHA-256: 900c8fca2bdbdd752f7773ad9d0eee897d8ddaa086eae4341f96f21833f99240
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=jlab+jbuds+air+sport+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448731/normal_603fdecf1dc91.pdfIn PDF document text
    • https://wipikiriku.weebly.com/uploads/1/3/4/6/134696444/wirotafufizefulosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413227/normal_5fcca04a6cc76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418567/normal_5ffac4574cc32.pdfIn PDF document text
    • https://zipixaxunisegon.weebly.com/uploads/1/3/4/6/134625234/serevu.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/english_conversation_lesson_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5fcf463c07e6d.pdfIn PDF document text
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/0f42a.pdfIn PDF document text
    • http://lowixop.22web.org/samsung_led_tv_turns_on_but_no_picture.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385410/normal_5fee61ec4ef01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_600cc4c9bc164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443803/normal_603673523e6be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393893/normal_5ffa91f54923e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_6036ce931914e.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/what_are_the_features_of_a_games_console.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/is_he_dipole_dipole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fcf01e43e4a6.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/paromume.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gapevizatijaba.epizy.com/19058996484.pdfIn PDF document text
    • http://pasigajixivete.epizy.com/xofezujezupoxedemisete.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/favorelalokejur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD104 5404 bytes
SHA-256: 6961a988a9d25d4b34316e7c473aa31115854000cb903129889f35fb253225b8
font_01_sfnt_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 10168 bytes
SHA-256: 05b772cdf60aedc1dfafac51fdc888ab1359bac4c7320b8f40f1259bc0faa3bb
font_02_sfnt_off000105c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34