Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bc3edb4b4ab386…

MALICIOUS

PDF

71.5 KB Created: 2021-02-22 00:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bf26eaa46230513cbccf1cd5111c4989 SHA-1: e85a04f5fa9a18f354c293430f46d24d4899a842 SHA-256: 16bc3edb4b4ab38653a20fcbf99e35f7d565f066db814dc000a699c6e13f6fd5
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://maypoin.ru/wix?keyword=larin+floor+jack+replacement+parts PDF link annotation
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/6409801.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/hbjabib/vizokomilubilesebumiwasok.pdfIn PDF document text
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/6f1049cdf7e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5ff09e7e08232.pdfIn PDF document text
    • http://seviregigaguz.22web.org/pigikifes.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/vuzotisenixava/brown_v_board_of_education_impact_on_society.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/28881028622.pdfIn PDF document text
    • http://ralorepozariti.rf.gd/what_are_the_8_main_principles_of_the_data_protection_act.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/computer_updater_free.pdfIn PDF document text
    • http://mejefelutirarej.epizy.com/noropepirudumofaderuga.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/christmas_background_photoshop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/ethiopian_reporter_twitter.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/39395745581.pdfIn PDF document text
    • http://vugoban.epizy.com/10149289624.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/josagomo.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_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 5244 bytes
SHA-256: 0f9ed8f07a5767adaa698f7191962fa81e132b4ef4084dc1118b3b30ac1dac4e
font_01_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 10352 bytes
SHA-256: e86e7bfdfa9ca9e1a81a6be621feb64370406831346a91fceb7055f1b32c953f