Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e162bfbf67e77f0…

MALICIOUS

PDF

79.3 KB Created: 2021-02-16 08:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 587a6ca71cc46fcfbcf2377e912470a0 SHA-1: 2c4890548c691e471fc5bc7a26e53fc800bde7b4 SHA-256: 3e162bfbf67e77f04bd3a75703318d9c3b1337cee9aea49e00f2f38156207d01
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://jottigo.ru/123?utm_term=ancient+world+history+holt+mcdougal+pdf PDF link annotation
    • http://inostrana.com/56225603504335fv.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/pemezoxekafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480904/normal_600ab7145126a.pdfIn PDF document text
    • http://selolaz.66ghz.com/64785790881.pdfIn PDF document text
    • http://daniele.store/grand_plaza_hotel_corporation_annual_report_2016sk52w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5fefbcbbb8120.pdfIn PDF document text
    • http://xtw2.club/el_bullying_causas_y_consecuenciasbma9v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://badakun.rf.gd/birthday_special_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/52655161444.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/diabetic_ketoacidosis_in_pediatrics_guidelines.pdfIn PDF document text
    • http://metepukiwameme.epizy.com/file_extractor_free_for_pc.pdfIn PDF document text
    • http://bugudejekizukem.epizy.com/fiwaleralevize.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/music_from_soundcloud_android.pdfIn PDF document text
    • http://xekibedeba.rf.gd/real_madrid_ajax_highlights_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/busy_busy_new_song_ming.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_off0000f780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF780 5752 bytes
SHA-256: d494862c60d155de3c511100e152d6f8276490a35b552e12fbe06e25c7fb5c6a
font_01_sfnt_off00010b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 10976 bytes
SHA-256: 6a18465c1de97df44293edf5d1003e7b24329412d50bafc754fcc9046b5629db