Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d3554d280a4264…

MALICIOUS

PDF

69.5 KB Created: 2021-02-16 04:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 346872bad838bad0df6953ba27d8c59e SHA-1: c2bdb9f72c5d5e1fba3762258f300380335f6c10 SHA-256: 12d3554d280a42640c03a42ac0d36b9534c7faf99ba1c3abde0a86fb27289ff6
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/wix?keyword=making+recombinant+dna+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_5fd18d8f22c29.pdfIn PDF document text
    • https://jetosopotow.weebly.com/uploads/1/3/4/0/134018613/gedanonux.pdfIn PDF document text
    • http://duduzojezojak.22web.org/jabariya_jodi_movie_songs_mr_jatt.pdfIn PDF document text
    • https://pudawiwut.weebly.com/uploads/1/3/5/3/135342926/saxikakizujede-judosaz-gemukat-vilupirep.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/xofipamuketotat.pdfIn PDF document text
    • http://pivifemopore.22web.org/rikizumava.pdfIn PDF document text
    • https://mowofagafuvu.weebly.com/uploads/1/3/4/5/134594922/sedizavi.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/nuvukivaxiren/dog_bite_treatment_guidelines_uk.pdfIn PDF document text
    • http://fupewazogapoda.rf.gd/2713926001.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/klezmer_violin_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/bukepefimonuvonamifale.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/gijugebasurawi.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/harrison_cardiologia.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/58718834419.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/sevikoza.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_off0000d3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A2 5620 bytes
SHA-256: 66c836e441dafbe718495514b5d527831320a1917667fe34b6808280a099408a
font_01_sfnt_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 9996 bytes
SHA-256: fe0cc05ca203a5b01870b4e599cfa94a4b4096480a61584fd169e439d867fb9e

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