Malicious PDF — malware analysis report

Static analysis result for SHA-256 e818772c2a8cd091…

MALICIOUS

PDF

66.5 KB Created: 2021-02-15 08:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ad35c5f2ebc01b3a8e2d93cc1e5dddf7 SHA-1: e9509d219522022b460d56f5664bc91a633ce8c1 SHA-256: e818772c2a8cd0917c30b7414c51173409861d05523d8350816150790fe21560
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=west+hartford+public+schools+academic+calendar In PDF document text
    • https://musokolej.weebly.com/uploads/1/3/1/3/131383826/47455.pdfIn PDF document text
    • http://hookup755.fun/igcse_add_maths_past_papers_topicaln4fh6.pdfIn PDF document text
    • http://idealica-columbia.site/battle_chasers_nightwar_ultimate_weapons_guidemtu8g.pdfIn PDF document text
    • https://tapituxupali.weebly.com/uploads/1/3/1/3/131382330/vuxabapagewabukiri.pdfIn PDF document text
    • http://twobigs.space/hamari_adhuri_kahani_full_movie_downk0y5q.pdfIn PDF document text
    • http://balifruit.com/the_wedding_banquet_song_sheet_music86gi1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_601d637ee0b5b.pdfIn PDF document text
    • https://siromalad.weebly.com/uploads/1/3/5/3/135312661/jutin-sojesevimizoz.pdfIn PDF document text
    • http://souve.me/counting_stars_piano_sheet_music_easy_with_letters8uu4u.pdfIn PDF document text
    • http://hookup157.fun/lupukafiwamezofixuvaziwtjs5.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/sefepugolupalax/86925997988.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/41735689464.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/bukupiluxiwinomusete.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/tajigowabujuwavus.pdfIn PDF document text
    • http://pogifovemujure.epizy.com/jotaro_s_theme_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_off0000c728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC728 5548 bytes
SHA-256: e4d43f0c5dab0850eac31b29c9eede502e91745d2f6deafb3be2a518fbc1ead5
font_01_sfnt_off0000d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 10180 bytes
SHA-256: 001ffca8350a7332115940585e366c06af340a8b104b20f3c92c190b197bd47b