Malicious PDF — malware analysis report

Static analysis result for SHA-256 b757df2a2f8a8afd…

MALICIOUS

PDF

75.3 KB Created: 2021-01-28 20:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6aa821d03f2a2bcb84f4facabcfa5d6f SHA-1: 164f855c5184ad8616a554a0ac820df44dddfdb4 SHA-256: b757df2a2f8a8afd9ff8522d2fd97fe29e94f2eb52d420ba16f237f9300e38fc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffnew.ru/wb?keyword=screen%20recorder%20with%20audio%20and%20facecam%20for%20pc PDF link annotation
    • http://grigolia-studio.ru/instagram_feed_plugin_by_smash_balloon_freernzru.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/8b09f572555e749.pdfIn PDF document text
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/mujari_losit.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/naxepidego.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/router_table_insert_plate_template.pdfIn PDF document text
    • http://zedukibawubige.22web.org/35950678016.pdfIn PDF document text
    • https://tunuzari.weebly.com/uploads/1/3/4/3/134316111/guzunebosuziz_kiforetepo.pdfIn PDF document text
    • https://kegotewu.weebly.com/uploads/1/3/1/4/131437679/4520909.pdfIn PDF document text
    • http://itrom.fun/pokemon_sword_and_shield_tcg_next_expansion541t7.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/kitakilesa/gebasegekus.pdfIn PDF document text
    • http://sofidusujewa.epizy.com/lifenamowomovimekore.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/manualidades_con_material_reciclado_navideas.pdfIn PDF document text
    • http://pulawev.epizy.com/letter_of_resignation_template_word_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/rivavusetesosejet.pdfIn PDF document text
    • http://wirizobesopo.epizy.com/graphing_point_slope_form_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/beyblade_burst_app_5._2.pdfIn PDF document text
    • http://lugopupi.rf.gd/macbook_pro_macrumors_buyer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/43078079077.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_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 5380 bytes
SHA-256: 0b7ad87ff1230e75f15872c856b44064f223ba477aa70268c9d62662df8ae153
font_01_sfnt_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 11368 bytes
SHA-256: d4ff159c5d78fb843e280eac7e9dea066edf5d111ca1ad9441c685b41995355a