Malicious PDF — malware analysis report

Static analysis result for SHA-256 9332c73df8ee7ff6…

MALICIOUS

PDF

69.5 KB Created: 2020-11-25 02:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 74292c82023bacee5f4fd88b438706b6 SHA-1: 5c853df7ba6ed8e14f325a43a739c354d13ec91a SHA-256: 9332c73df8ee7ff6a0b4e8a41bad41f4afd0850ee7131523708f8725e22c4fab
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, likely intended to redirect users to malicious content or facilitate SEO spam. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to lead users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffnew.ru/aws?utm_term=advisory+board+charter+template PDF link annotation
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/10edcafe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5fb2e0a70da88.pdfIn PDF document text
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/lewijijugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f897907e9cd8.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/jugelotonatuzuvulof.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/c5167552-0c77-454d-8c5d-03040477c87f/best_vpn_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb503deb-5e9c-40a9-91af-ea2ae853bc76/wimelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e80037-ee37-459e-b0e0-2bb08366cf2b/53449561205.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/oil_for_honda_generator_3000.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/giganatudinexiwawixeseka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af462282-67dc-4df2-9901-6b8d9c82d1b1/despacito_cello_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/luzatikozibowuburig.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_off0000d154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD154 5604 bytes
SHA-256: 1cacb0d550872a5d79d2190d41de84e2c6a5e14af1287f898a2868d007d50830
font_01_sfnt_off0000e43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43F 10948 bytes
SHA-256: e078511b64a72b42fe3277233b9f5f329cc3cd9263f891eb276d9cacfaa08e6c

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