Malicious PDF — malware analysis report

Static analysis result for SHA-256 da595a73954fe545…

MALICIOUS

PDF

71.4 KB Created: 2020-12-21 00:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d4c21f23c318b9d001fdaaee098f6868 SHA-1: c246889b0688d3cd2ff7ad9a5156290a667a13de SHA-256: da595a73954fe5454acd25021746d4d9091e1a6d53c35791f51d486f6b000053
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, disguised as an advertisement for a laundromat. This indicates a phishing attempt to lure users to a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gettraff.ru/strik?utm_term=tiny+bubbles+laundromat+woodsville+nh In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_5fb6d9fdc754b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_5f9c34c88de51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f8943386b886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f91e4415b451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f9192e4e4569.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/8016b6a1-1132-4a28-823f-0cbad3e466c1/xuresafiriruxenewefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b9ad31-bafc-434e-874c-71b592859e2e/tezuresom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f65337-895d-4c02-b5d1-802eb9042a0c/41322585375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6f5034-251a-4d3e-85f6-2fa7d2ea5ad1/87120158666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab32794-f7a6-4e94-b4c3-e3804885b44f/kimew.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/bob_s_burgers_season_9_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe3ca70e-0195-4186-89c3-1925e9375dd8/46648494118.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79625cb936d6a06aa469d/t/5fcca4bdfe657040d58d2a2b/1607247038311/scott_world_champion_mtb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde7a645fb7d01a9b07559e/t/5fdebbe15809ae343403e99d/1608432611297/49714721615.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C8 5408 bytes
SHA-256: 38efae4cf223cb4770727bc22f24b6baa185ca8a61498c092f7b51bb5d35457f
font_01_sfnt_off0000d316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD316 11732 bytes
SHA-256: 30dde654e84cc6dcb3eab4259fc379e8924c6b1bfe9e8b95982d18a88f44aada
font_02_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 16480 bytes
SHA-256: 591df77ebe2136818fff62704a9ffe7c020cd97f8303f9b7f68854c250004d4c

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