Malicious PDF — malware analysis report

Static analysis result for SHA-256 b895f2309fb76c7d…

MALICIOUS

PDF

76.0 KB Created: 2021-02-14 09:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1c31b27b9c59aa4beb52b4af334a0148 SHA-1: a7b455f9de5172e915e4c92fbc8b657ecf41b5b4 SHA-256: b895f2309fb76c7d910eba297e910eb925809667aeae125819bb7767c3e985d9
196 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
  • 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://jottigo.ru/wb?keyword=carols%20by%20candlelight%20adelaide%202018%20performers PDF link annotation
    • http://wbigs.space/ribobozas0vbiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5fcd6db02dc35.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/dolojajavusegamal.pdfIn PDF document text
    • http://delifeschool.com/word_puzzle_crossword_clueee61r.pdfIn PDF document text
    • http://vnatural.space/angielski_dla_wiecznie_pocztkujcych_chomikujmjj5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370268/normal_5fef86a654e54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5fcdeb1988bb1.pdfIn PDF document text
    • http://shmelev.pro/forbes_travel_guide_jennifer_kesterbvvbo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465007/normal_5fe2ade03e652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_600d99926cb1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_601af0ada7c56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memaded.epizy.com/summons_on_first_amended_complaint_form.pdfIn PDF document text
    • http://zawidapiwixub.epizy.com/14528391635.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/29960274642.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/93300912101.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_off0000e8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A3 6236 bytes
SHA-256: 1fa1c443dabf982845a207311a6457fc691251196790e940cf8375910bca130a
font_01_sfnt_off0000fdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB3 11124 bytes
SHA-256: 8c88af1e8006ad5419cda754ffd593262f225c51d48f3289e779140810fc32b9