Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ed7193961d64b3…

MALICIOUS

PDF

72.6 KB Created: 2021-02-15 12:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c386af759064d8c0bfd3350c4ad9f986 SHA-1: ed01ecd8b6ef52241e360d96896d18c1fc390981 SHA-256: 88ed7193961d64b3d3f96aa1ddad46377d2a9386f6811ac3282e7beae68a7df0
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/wb?keyword=1978%20howard%20miller%20grandfather%20clock%20value In PDF document text
    • http://xuvivok.22web.org/tital.pdfIn PDF document text
    • http://free-at.pro/748035160326ruo8.pdfIn PDF document text
    • https://ferovagadimi.weebly.com/uploads/1/3/2/6/132696304/85386.pdfIn PDF document text
    • http://artdebug.site/63262400181dotyy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403260/normal_5fcb016a4cdec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_6025f489c8893.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5ff4562e54c8d.pdfIn PDF document text
    • https://gekojivigi.weebly.com/uploads/1/3/1/0/131070255/damisidifop.pdfIn PDF document text
    • http://xupubetulitut.iblogger.org/stratified_and_systematic_sampling.pdfIn PDF document text
    • http://pafunote.iblogger.org/daemon_prince_of_nurgle_datasheet.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/satuja/gutusesulibesanowefanuzak.pdfIn PDF document text
    • http://vimobuzu.epizy.com/duturejebif.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/1061480058.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/below_her_mouth_movie_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/exercise_guidelines_in_pregnancy_new_perspectives.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_off0000dc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4E 5860 bytes
SHA-256: 78a0beb4fef09097cbd4064caf510f190b30be515a7304c70af5d7f3202623f0
font_01_sfnt_off0000f03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 10872 bytes
SHA-256: 5f0fbecb573f90109415587ca4527980055055ebc4981b021f55b24f116df8f1

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