Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fcc525efcb0c9f…

MALICIOUS

PDF

64.0 KB Created: 2021-02-26 00:05:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 25e5ecc87c1828c2a4fd1474ad1e2f82 SHA-1: e8d1e9156835218e98a5903cbf95c65fe8b2a1ed SHA-256: 15fcc525efcb0c9fcfc1b6913be6e432a2cb8e3711df92d2f111aaed4e27e833
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=ixl+algebra+1+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371787/normal_601a500e4c629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_5fd61315ea60d.pdfIn PDF document text
    • http://bio-ita.fun/jelefukureptvn.pdfIn PDF document text
    • https://befapoge.weebly.com/uploads/1/3/1/6/131637854/727dd07e0e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fdb851a6060b.pdfIn PDF document text
    • https://dujililapute.weebly.com/uploads/1/3/5/3/135347223/tesinigiwi.pdfIn PDF document text
    • http://requiremcgood.com/what_is_imminent_lawless_actionjl7tm.pdfIn PDF document text
    • http://jilet2.club/romijudipix9xm5k.pdfIn PDF document text
    • http://mmeueue.space/penusokesedipy15x4.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/tosevud/54180408609.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/dipefujusipixabozanoze.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/89556416236.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/biotransformation_of_drugs.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/74841253136.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/nasty_majesty_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/zipewitolivujozawexi.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/89650214290.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_off0000c096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC096 5140 bytes
SHA-256: 8a2ef099d7bce1bcd272c09d6419be936bd6fbdfb11ebaf4def6f1d3734f8ab7
font_01_sfnt_off0000d23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23E 9656 bytes
SHA-256: 37dc6d2415b4e0793ecc62d0828cc8f9d0cc6d2f023d15501aaaab38b84edf18