Malicious PDF — malware analysis report

Static analysis result for SHA-256 9135d87b1acaa08e…

MALICIOUS

PDF

68.6 KB Created: 2020-11-10 10:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e54b9c7274168454ef125fdbbe49bf98 SHA-1: 2e0c2b0f8ce6ed4a18f5c69b801a01d2540c3416 SHA-256: 9135d87b1acaa08e15c23f371e808ac6e47fdd7322e5e9e294383ba4b1513975
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The primary link directs to a URL that appears to be part of a phishing or scam campaign, masquerading as a cheat for a popular game. The document's structure and link farm indicate an attempt to drive traffic to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=how+to+age+up+a+sim+sims+4+cheat In PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/rumurikokar-zejebow-pomudopi.pdfIn PDF document text
    • https://xiletepegokif.weebly.com/uploads/1/3/4/3/134319576/fuxafe.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/4a9fe5b98282.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/5056949.pdfIn PDF document text
    • https://zitofizifejiza.weebly.com/uploads/1/3/4/7/134706741/2fef52f.pdfIn PDF document text
    • https://demaromut.weebly.com/uploads/1/3/4/3/134358025/fakobidutulemam_mufiduvemepa_fazilidadutejup_vatalamizilovid.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/03162279-ed15-40cb-a363-13618f3e5ec9/kuseduzifotomufuwut.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/wifalavofog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581f2b03-8839-469b-b42d-730d1fa63e71/gowujipaji.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/quadratic_function_graphing_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/24700653442.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_off0000d0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A0 5360 bytes
SHA-256: 41512fbf250b3a836f4c9f5be7cce9fb5fbcd41028f6c7bed1a910fdaa5853b8
font_01_sfnt_off0000e2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DA 10128 bytes
SHA-256: d12b3509e47f1396201fa31e6af8adef6f4af4309e94ce542c5d85e3dd1a7a5a

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