Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0249183a09bded…

MALICIOUS

PDF

72.1 KB Created: 2021-02-14 10:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1e586475e985efcf119eb186f07b1037 SHA-1: 4c08c180b5ba1ed0a31edbae97e0af96be29af82 SHA-256: ab0249183a09bded43ead0156fb5b3c3cfe433740237d1a712f528c17523623f
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=superfighters+unblocked+games+turtle+fish In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_6024305375146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5fc988460d0fe.pdfIn PDF document text
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/pojatixutasirit-nofapu-mewawisowolefov.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/mibamomej-bunezegevelozif.pdfIn PDF document text
    • http://bapozuwemixad.22web.org/fluorescent_ballast_replacement_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_600ddc01b2c39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451355/normal_5fcf27711992d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fc8853261658.pdfIn PDF document text
    • https://zeloruzo.weebly.com/uploads/1/3/5/3/135349371/c1364232.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/rabonebuditar.pdfIn PDF document text
    • https://fimiximokizo.weebly.com/uploads/1/3/1/3/131384127/373595b4384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480591/normal_5fde3035c9c03.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/dufewunen-kamurenixu-fodejonita.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/7b88277269cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakafof.rf.gd/android_virus_scan_software_free.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_off0000dcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAA 5876 bytes
SHA-256: 12eac48101b0485d4acf04c248cb026b696515bb194dfbc2b5e5f45f50f0aaa5
font_01_sfnt_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 10324 bytes
SHA-256: 2521ccecf39dfd543268589af1010420dd76b86c217f73846b12f030250c636f

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