Malicious PDF — malware analysis report

Static analysis result for SHA-256 437971018be53cfe…

MALICIOUS

PDF

69.6 KB Created: 2021-02-21 16:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 995a715db18bbdb6bf20207231a24ea8 SHA-1: 3a0fea35cf1fbe182debdc73c084534fbf533674 SHA-256: 437971018be53cfe0c3919321bee4f970e73c004a2a2fff5d16a64de98505b1f
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/wix?keyword=metal+slug+emulator+unblocked In PDF document text
    • http://reform-st.ru/vatuzisixebirisopetxozik.pdfIn PDF document text
    • http://detonic-italia.website/periodic_table_activity_worksheet_docuue59.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/street_racing_3d_mod_apk_unlimitedrfbec.pdfIn PDF document text
    • https://xapeposatu.weebly.com/uploads/1/3/1/4/131437079/1624051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_6029cd70dc7f8.pdfIn PDF document text
    • http://carins.info/bridgedale_hiking_socks_size_guide0xcoz.pdfIn PDF document text
    • http://uscarins.info/biwavirisosofefmqu2.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/potamotaz/bareilly_ki_barfi_movie_123mkv.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/18932387912.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/skyrim_heavy_armor_training_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/test_de_ansiedad_y_depresion.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/formal_dining_room_ideas_colors.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/aua_oab_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/makeup_business_plan_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC536 3436 bytes
SHA-256: 7a65401e1f27d93d24964ab1bc43a5a001325a706ac8303fbbce907e1f82e83e
font_01_sfnt_off0000d17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17B 5468 bytes
SHA-256: 9dff39f7ca19e8115f7627a26f1d039b8a1ea2d9070711bd41140debaeaafa00
font_02_sfnt_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 10260 bytes
SHA-256: 6b1722829eb37b4a758e99c0c19747522e29b8604cc19121f60ccb64c3867672