Malicious PDF — malware analysis report

Static analysis result for SHA-256 5749c5ddc9a5a54f…

MALICIOUS

PDF

67.0 KB Created: 2021-02-09 03:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5ee5722e1c209bfc6111e39cdfa967f4 SHA-1: bdace5311377fd4a1c226a0fe551371ed1b87f18 SHA-256: 5749c5ddc9a5a54fc661c4dcfff23388bb619ef1587812a6d7ea6d9e4517596b
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://yafferge.ru/wb?keyword=aha%20bls%20answer%20sheet%202018 In PDF document text
    • http://edalovert.xyz/mickey_mouse_coloring_pagest51iw.pdfIn PDF document text
    • https://ninuwekij.weebly.com/uploads/1/3/4/6/134625354/juvoxenesi.pdfIn PDF document text
    • https://sifuparara.weebly.com/uploads/1/3/4/3/134352995/6020067.pdfIn PDF document text
    • https://toroxamaje.weebly.com/uploads/1/3/4/0/134017611/2106037.pdfIn PDF document text
    • http://kupivse.xyz/chhota_bheem_aur_krishna_full_movie_tamil_downloadw6ei8.pdfIn PDF document text
    • http://domainlimax.xyz/10922194842yw0se.pdfIn PDF document text
    • http://flymoney.net/cafe_racer_jacket_womensaebgs.pdfIn PDF document text
    • http://ostanni.fun/7551850886366dee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487927/normal_6006584edc0a4.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/jedobufudajewu/android_sdk_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/10363419215.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/27464011657.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/39166811315.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/chemistry_chapter_13_test_solutions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/74911443510.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_off0000c8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B2 5512 bytes
SHA-256: df113af6cd97feab76bd31b35813c18e0fac9d7eabc469a661946fca1bd5b0ff
font_01_sfnt_off0000db75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB75 10752 bytes
SHA-256: 4986e433d9bb0ffd7c177fa4dc53bf411b54bc0b7ede00c2f18f5d715e93b243

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