Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1347539a405713…

MALICIOUS

PDF

83.0 KB Created: 2021-02-13 20:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c582b73910553506b8349377eb710951 SHA-1: e12187fa681b23be3e06e5ee52974da94ac94c8f SHA-256: 1b1347539a405713bb3a9af14fe2e0c247200a1d5efc7e7809acb92ab10b79a6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=coppell+high+school+course+guide+2020-21 In PDF document text
    • http://crysety.xyz/chicago_mayoral_election_guideyfp3s.pdfIn PDF document text
    • http://wordwild-store.com/wipavedeve0r1s.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/ghfhcua/31854815415.pdfIn PDF document text
    • http://wegisinebirixe.iblogger.org/totove.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/gctMigX/17301852696.pdfIn PDF document text
    • http://summ-ita.space/103473146578njsv.pdfIn PDF document text
    • http://tosety.xyz/nafaborakanetojaxofikaw2hyjd.pdfIn PDF document text
    • http://alkostore.xyz/power_transformer_polarization_index_testkkrwz.pdfIn PDF document text
    • http://phillipen.online/77302248806cydl5.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/luworizesupox/60247632193.pdfIn PDF document text
    • http://vibofaser.rf.gd/94606623694.pdfIn PDF document text
    • http://tabumuxiwuno.rf.gd/adventures_of_jojo_full_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/reporting_phishing_scams_to_police.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/741784812.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/free_gmat_practice_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/everyday_edits_halloween_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/aluminium_sheet_metal_brake.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/daxijigijoge.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_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 5388 bytes
SHA-256: 6746d21fa2b1bd15dade276e295d47e08629277aced9fe7aa71f505d9c6f2045
font_01_sfnt_off00011a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A93 10624 bytes
SHA-256: 1320cab6e26bdfc8349e2a80d2068a8c453b1d26e332af60288fea5e126f3157