Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ea1f1e83ba1918…

MALICIOUS

PDF

230.3 KB Created: 2020-12-02 22:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 40b353156001d21d3ff6dfc6abe11ab2 SHA-1: 1803a463f5f52537ddd43fe6f541a1ad93962eab SHA-256: 50ea1f1e83ba1918a918e0b1d772060ab4da12340663a1188fbd42badcd3995b
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a lure related to Elasticsearch API, likely intended to trick users into clicking a malicious link. The embedded URL `https://gettraff.ru/aws?utm_term=elasticsearch+api+get+index+template` is identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/aws?utm_term=elasticsearch+api+get+index+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4480750/normal_5faad6d13f992.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/sukobogixe/gapawipamozil.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/11391000314.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/segenekiboxere.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/dcs_a10c_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/47917709895.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/xizasoxofom.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/bhakti_bhojpuri_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/sheet_metal_fabrication_shops_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/7203995854.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/uses_of_bacterial_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/social_media_management_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/nirejolomagujenuwitan.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00034cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34CDB 5512 bytes
SHA-256: 74cb506e226a1d1af2e588cb6d49a9398d34c2495b9121dacce8503110bf73a1
font_01_sfnt_off00035f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35F7A 12716 bytes
SHA-256: 64da1e7164d0a4a81f30ba9aa11e21355d353ff315cb799c98c0fd5292e448e1

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