Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bad04e3e333aaac…

MALICIOUS

PDF

108.8 KB Created: 2020-11-20 20:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ea96f4e8dff7eb0a4b1dd7908196c4bf SHA-1: e01aad53f37a296e205bb712011f9db5e75c0047 SHA-256: 9bad04e3e333aaacf7d216f8b8035f03945138152c43afa460d0447532b2f904
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple embedded links, with at least one pointing to a known malicious redirector. The heuristic firings indicate a high likelihood of this document being used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://cctraff.ru/123?utm_term=tale+of+the+heike+summary In PDF document text
    • https://ganusanawopat.weebly.com/uploads/1/3/4/4/134488834/muvesuvase_fazesemosolen_toxitar_dinofufa.pdfIn PDF document text
    • https://lesavudipuvu.weebly.com/uploads/1/3/4/3/134338744/07eab8.pdfIn PDF document text
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/f388174a89b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb793110-a97b-4bc7-8a9f-11773911978e/gokutinibalovex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2253b50-a412-4bd1-be07-7cd2c5ab766f/8768952780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3df379b-9196-4926-b8f3-95a960c3b231/67762537946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f2a946-f464-4aa4-921b-d8b05cdf610f/apush_book.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/nupesununumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf92cfd-af06-43bb-9cde-a33a284e5136/xorivobulepafaruxopiwix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d5a863-6b08-40f3-84cf-21d76d317ae3/antigona_sofokles.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12975 21672 bytes
SHA-256: 9da14c618fdd256d6c5a79074b6fddcb4a9b1c6f1b3ccbcb9c54f6eb7d63cd4b
font_01_sfnt_off00016deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DEB 5120 bytes
SHA-256: beb1c849bdfad2ede43bc630f46980f49855398212105d30b4bd48f90d218dd5
font_02_sfnt_off00017f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F34 12772 bytes
SHA-256: 0ca15ec875696b9aa0248a06057012f49f0eede5e742476ad6586d75dbb95005

Open this report in the interactive analyzer, or submit your own file for analysis.