Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41b991b16393fe4…

MALICIOUS

PDF

54.2 KB Created: 2020-10-28 12:48:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6cbffaa9b24cc0db1b45c746cd927282 SHA-1: 9cfa549d97938e6a381c686bd61d81d58255d372 SHA-256: a41b991b16393fe4de5b296b65072f4af72b96b547f7ccd501d5e4be45f94dbb
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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://cctraff.ru/pify?keyword=rage+of+bahamut+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_5f8e8f519aae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_5f90951d20a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5f99013b56810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5f8f6ccb8a648.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00007a28.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00007a28.bin)
    • https://s3.amazonaws.com/dabatisew/realistic_pencil_drawings_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/ninabol.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/raxuli.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/diagnostic_lab_equipment_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/asme_bpvc_section_ix_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78573fb-88e9-474a-a201-88dad072f63c/xigogobudalopagun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fecef47-b25c-4c73-b548-291750999f18/8725004796.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/current_cabinet_ministers_of_india_in.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/lic_jeevan_anand_policy_149_premium_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/putonadidanodavezobawen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6054711-88d8-4e79-ac8f-78319f20a1de/pozonaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a6de85-16eb-442f-8cba-a33c9819b906/american_history_reading_comprehensi.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/23054719288.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/80754814838.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/dabelajezedufubuwuke.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/cracked_sony_vegas_pro_13.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/acute_bronchitis_patient_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dac4f6a-29b4-42fd-8862-2b12388df678/19811018136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a16bef-f28e-49e4-9ef3-0615ec3ea15e/zawukobak.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 extracted file (font_01_sfnt_off00007a28.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_03_sfnt_off0000b5ea.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_03_sfnt_off0000b5ea.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B83 4148 bytes
SHA-256: ea5b0628adc6088137e5e1ff62ed35b42a8be5d2bb6edcbd82e32b669f321aab
font_01_sfnt_off00007a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A28 5220 bytes
SHA-256: c670c354bc8d65f55f683d1ea492f020e78ba6fbbfc3f11cf3bf0e5a611b32fc
font_02_sfnt_off00008bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD8 14800 bytes
SHA-256: 19c746eedaa5405695a120fd4f6a04ded821712f0edfd18952cb15137ef5a07d
font_03_sfnt_off0000b5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EA 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e