Malicious PDF — malware analysis report

Static analysis result for SHA-256 5291bb7a7606f250…

MALICIOUS

PDF

71.8 KB Created: 2021-02-18 21:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 146cac42a0c418c5d095d59fa8f8af94 SHA-1: e64ddaad8b4b6ab54eac4557f6130785c0ff65ed SHA-256: 5291bb7a7606f2501b9edfc265d74609fead2b6a07a92d7738173caa6c51d697
254 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.
  • 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://crophysi.ru/wix?keyword=multiplying+monomials+worksheet+algebra+1 In PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/fe299fa2bd3d.pdfIn PDF document text
    • http://tomogorman.com/askew_crossword_clue_informal62vrx.pdfIn PDF document text
    • https://xefulexemifin.weebly.com/uploads/1/3/1/3/131398452/ecbaa08e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_6018430a1e917.pdfIn PDF document text
    • http://thesimplycompleteseries.com/poretadelafotofafojasomestj2n.pdfIn PDF document text
    • https://cdn.sqhk.co/gozafavapawu/gejdCib/birds_of_prey_full_movie_free_download_720p.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/fetugugok.pdfIn PDF document text
    • http://luminar4-download.xyz/861969856337pao5.pdfIn PDF document text
    • https://rigafimer.weebly.com/uploads/1/3/4/9/134901715/1181294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5fc8f8e9c09cc.pdfIn PDF document text
    • http://zdorovienashevse.xyz/pazejavofijekwlw85.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/kovilowab/jenubeluvogonegupubusol.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/travel_itinerary_template_excel_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/65182967179.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/76467503036.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/40747957153.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/dubulig.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_off0000dbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB5 5688 bytes
SHA-256: 253e894fc6ff257136374ffd643a5ee2aacbe450167654ccab7604ecbe04002d
font_01_sfnt_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 10224 bytes
SHA-256: c4c5d2a1c4d6c47c3aab5bb3c41c1ec2da6e3630cba64d8ef3d21e65b376acdd

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