Malicious PDF — malware analysis report

Static analysis result for SHA-256 d544f4f149c98436…

MALICIOUS

PDF

64.7 KB Created: 2021-01-21 10:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 427571cc407d9a43babf5ab90a02c309 SHA-1: acadf84720e30a11c574b10dfa86931bcb87745c SHA-256: d544f4f149c9843689c6b3e5a12800c6549fb8eb49b6cfc77c0a64e29e103819
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/123?utm_term=breville+espresso+cleaning+kit In PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/1247009.pdfIn PDF document text
    • https://site-1178160.mozfiles.com/files/1178160/22977560853.pdfIn PDF document text
    • https://site-1253176.mozfiles.com/files/1253176/fanip.pdfIn PDF document text
    • https://site-1178100.mozfiles.com/files/1178100/14258582082.pdfIn PDF document text
    • https://wuwikofoxanep.weebly.com/uploads/1/3/1/4/131437976/71ed11e6555f.pdfIn PDF document text
    • https://site-1176426.mozfiles.com/files/1176426/zilavunese.pdfIn PDF document text
    • https://site-1249955.mozfiles.com/files/1249955/xelixapukirux.pdfIn PDF document text
    • https://site-1177757.mozfiles.com/files/1177757/gonemovu.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/minaxigevani/fogemobijorikibupuwib.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/12079521850.pdfIn PDF document text
    • http://kuporalegumema.epizy.com/acoustic_guitar_headstock_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/5983929057.pdfIn PDF document text
    • http://ritopagagibuxu.epizy.com/53606232278.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/android_onesignal_push_notification_example.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/endangered_animals_research_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/27389055962.pdfIn PDF document text
    • http://sebipukavore.epizy.com/kinsey_report_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/dotnet_new_wpf_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC140 5272 bytes
SHA-256: ddf8398e1eb17aae109d4ada95aa0acfa6fb57934eea0224d6aa763bd8ee3be0
font_01_sfnt_off0000d34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34C 10056 bytes
SHA-256: 4cc4152df183477077aa6150fe227c184c66db7e838e364521c94001dfd53cf0

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