Malicious PDF — malware analysis report

Static analysis result for SHA-256 6410e6fda62058b1…

MALICIOUS

PDF

72.7 KB Created: 2021-02-10 17:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 169c484765eac7cb8538f86208b57b1a SHA-1: 268f728d0ca0ab533a3e8a0fadfae82ef3f5a77e SHA-256: 6410e6fda62058b1e3dd1a34c878bd38c050cf45a9b06e70c94e93406118abed
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=going+to+halloween+worksheets In PDF document text
    • https://cdn.sqhk.co/rutesawir/XjiNjM6/download_game_toca_life_hospital_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/Igiifzq/42385007783.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488139/normal_5fef3c0155210.pdfIn PDF document text
    • http://onesmall.space/60899309033lo6vv.pdfIn PDF document text
    • http://groby-ritual.online/family_tree_worksheet_for_adultskowej.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/jAlTA1R/red_bouncy_ball_4.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/IgitMjf/picture_lock_screen_full_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/qriaWjg/18278789717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485943/normal_60213eff8382c.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/jcjiWic/pagakelebuseragusa.pdfIn PDF document text
    • http://7evenrp.ru/best_online_daily_planner_app9bb11.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/Uifieih/42722596727.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/tubupejevomo/math_conversion_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/mudopoj.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/tax_law_opinion_letter_template.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_off0000e17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17E 5136 bytes
SHA-256: ef09f7ffc52ea850f30e79ba243bf86b551868fe2e2c14f5c004323c423353f4
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 10312 bytes
SHA-256: 49a87c744585875dbc6d7b09a90c334db1ace3170eda62d62297c6edecb26f28