Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7784fe686b3f691…

MALICIOUS

PDF

70.4 KB Created: 2021-01-24 06:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2ee390d883605cf0f0fc5cbc41c77ea0 SHA-1: 36d482331e1636c61b5bc1c2dc452f5784b47ac2 SHA-256: f7784fe686b3f691a95a531feac4d9caeeaf46eb8e0b4d0d806ef2f3c3019b3e
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/wb?keyword=super%20brawl%20universe%20mod%20apk%202.%2018 PDF link annotation
    • https://site-1247386.mozfiles.com/files/1247386/devexpress_report_viewer_control.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412575/normal_5fc7d7b521839.pdfIn PDF document text
    • https://site-1178426.mozfiles.com/files/1178426/waves_tune_tutorial_logic.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/fijigd6/amazon_add_images_to_review.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/pekiwug_bumabojud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446283/normal_5ff0d156be26f.pdfIn PDF document text
    • https://site-1175548.mozfiles.com/files/1175548/tafelij.pdfIn PDF document text
    • https://site-1256939.mozfiles.com/files/1256939/pagisifinonekinejegotel.pdfIn PDF document text
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/nifegenajapitu-fimigala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5fc607c6edb16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409417/normal_5fc76ed926f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5fd8b5e81e9cd.pdfIn PDF document text
    • https://site-1168250.mozfiles.com/files/1168250/7978862737.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/ijdiahe/deziderulozadewe.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/9ngrN6z/ten_most_interesting_facts_in_the_world.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D3 5972 bytes
SHA-256: 4fd9d5c39b65a68019b8d837344d8821aec86ccba5739abdd57e524bf5e8fb02
font_01_sfnt_off0000e623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE623 11928 bytes
SHA-256: 0f12e4a7754f29026fa3a9db571904e54245fcf5299445668f1c415428e5b68b

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