Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43c7a2b1795ad53…

MALICIOUS

PDF

69.9 KB Created: 2021-02-28 21:08:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d5a2842f1ad674c8a72fe25128db4966 SHA-1: d2f93b57caebf26f4aca106250a9b10e91ad6906 SHA-256: e43c7a2b1795ad536afc764b48e77ed5b5f1baff7ad7a9bed8fb3ac5efad267d
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://gimoguvi.ru/award?keyword=cual+es+el+pais+que+no+tiene+covid+19 PDF link annotation
    • https://cdn.sqhk.co/gabisolovima/augejjU/henry_stickmin_collection_infiltrating_the_airship_all_bios.pdfIn PDF document text
    • https://xerupirep.weebly.com/uploads/1/3/1/4/131408033/wudutunudoxidapus.pdfIn PDF document text
    • http://podipotekoi.ru/33522498803utaom.pdfIn PDF document text
    • http://ygrash.website/power_pop_bubbles_apk023ah.pdfIn PDF document text
    • http://varistop.site/xiwogo1wusl.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/domufujifadeborev.pdfIn PDF document text
    • http://natiral.space/896187528204odwk.pdfIn PDF document text
    • http://stopro.store/wumivarakeo1s.pdfIn PDF document text
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/9714196.pdfIn PDF document text
    • https://bewokeramubi.weebly.com/uploads/1/3/1/6/131636949/wexenuzuxumoj_lozefidisate.pdfIn PDF document text
    • https://binufigelivu.weebly.com/uploads/1/3/4/7/134775083/bikex.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/wonumafubij/lipujurakodimevadames.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/how_to_make_deer_jerky_without_dehydrator.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/bottlebrush_informal_settlement.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/mukirajuvekowabafuzizar.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/doodle_god_hd_blitz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/kugikunasutulen.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_off0000cd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3F 5268 bytes
SHA-256: 5e94760140563297337995440eac0672dc75335a3c1f50e553b50ae168982679
font_01_sfnt_off0000df41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF41 13188 bytes
SHA-256: b052f1b307f53b7cf2a50f0cfd4ca12003ba0860a4e1e179e3cf60f82e186690