Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57675f27495c3c7…

MALICIOUS

PDF

67.2 KB Created: 2021-02-02 18:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 20c29ccebb2387a366c61d0dab71134a SHA-1: 759a88d75671a384915883525c8d4245527e3421 SHA-256: a57675f27495c3c749dd11015372e49ea83e61574021a0eaf0a2f7b8fc3a309f
202 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=google+account+manager+frp+bypass+apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_5feb5bb9dfe7f.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/gd5hg13/best_sniper_shooting_hunter_early_access_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/ih2jchh/sumanotapidego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493602/normal_60016e2218074.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/boxujetanonikuv/household_expenditure_excel_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/vunedukilejef.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/equivalent_fractions_worksheet_for_grade_4.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/74866246714.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/b._el._ed_form_2018_du.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/zanakufogerimegomel.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/history_of_computer_invention.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/wuvurikesaberigisogid.pdfIn PDF document text
    • http://bajipodi.epizy.com/baldur_s_gate_1_android_apk.pdfIn PDF document text
    • http://jukiwifid.rf.gd/digital_visual_fortran_programmer_s_guide.pdfIn PDF document text
    • http://zuxulabawiba.rf.gd/zotugon.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_off0000c983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC983 5672 bytes
SHA-256: 1804f6d63ff64b6f4b1a3d72538aa4107003553d67aeb58033ca29ff4e0791b9
font_01_sfnt_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 10188 bytes
SHA-256: 12aad1f0e6f2c52153566f473db9e8e6ee8b7013f468e10281f290027d2f43ca