Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a4ae531aefb33f…

MALICIOUS

PDF

72.9 KB Created: 2021-03-02 13:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b5faba25189eb7d9f676a640ccfb47d2 SHA-1: f02d623b11dd1aaea3e81a96b335eb9379a77ab2 SHA-256: 56a4ae531aefb33f88263fbcbf8045e8d8e0161ffc64ad41d71fa64bf1a1ddc1
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=how+to+change+drum+belt+on+kenmore+dryer In PDF document text
    • http://ru-order-687646765445.art/how_to_reset_password_on_dell_venue_8_pro_tablet4abmb.pdfIn PDF document text
    • http://komarovskii.xyz/deadpool_full_movie_in_telugu_movierulzekhyx.pdfIn PDF document text
    • https://narefipikabisip.weebly.com/uploads/1/3/2/6/132682930/mexakomif-fimufapu.pdfIn PDF document text
    • http://jajosez.iblogger.org/4643995238.pdfIn PDF document text
    • https://fogolimavoburaj.weebly.com/uploads/1/3/0/8/130813413/1204463.pdfIn PDF document text
    • https://nijodumedogale.weebly.com/uploads/1/3/6/0/136082157/0b265d.pdfIn PDF document text
    • https://dururamud.weebly.com/uploads/1/3/4/8/134846475/koboweg_gakepeka_lovida_raxifawim.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/26818042335ol7wr.pdfIn PDF document text
    • http://sebekeruxa.iblogger.org/play_chess_online_with_friends_android.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/xomudufe/92255899139.pdfIn PDF document text
    • http://xegiseko.epizy.com/40556462435.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/master_forge_l3218-1_manual.pdfIn PDF document text
    • http://jemekovivokuvup.epizy.com/performance_improvement_plan_status_report.pdfIn PDF document text
    • http://rivamuboxu.epizy.com/82098214567.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/journal_of_interventional_cardiology_case_report.pdfIn PDF document text
    • http://vumavoralamo.rf.gd/rotipedetorori.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/57853171019.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/dearly_beloved_sheet_music_kingdom_hearts.pdfIn PDF document text
    • http://safasufozoz.rf.gd/15050136101.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/lovers_card_tarot_guide.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_off0000e043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE043 5536 bytes
SHA-256: 3a60589c9e2c0ac9692d06169e61f14b5dc5df204d282f6fe47bb4d91e828105
font_01_sfnt_off0000f2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 10160 bytes
SHA-256: 73b7728b52ac9ae8df3181a264ff9ff0a306e84dcee0893197997dfe62c4412a