Malicious PDF — malware analysis report

Static analysis result for SHA-256 afeec2edfc3fecbc…

MALICIOUS

PDF

61.2 KB Created: 2020-11-09 23:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 282e05f025ddcf49a77c6566498c2795 SHA-1: c2bc442c7ece1e7d588b191f4e64327b699e22c0 SHA-256: afeec2edfc3fecbc3b1e7474fb829c860fd25eb1e50ffbb6ab755d1cadfd3bd7
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?keyword=columbia+junior+high In PDF document text
    • https://wufikasokuwomoz.weebly.com/uploads/1/3/4/3/134359410/b441292.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/7593107.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/269267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454965/normal_5f9fcde0cd60f.pdfIn PDF document text
    • https://logukevagas.weebly.com/uploads/1/3/4/5/134507161/5276072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8e50f857341.pdfIn PDF document text
    • https://dopikilazobowu.weebly.com/uploads/1/3/4/4/134488506/dimodar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5f8ed5f92cbe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5f8e0f7748fd0.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/9839741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f8f1a4b42f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5f8896778f59c.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/7959832a-50c9-4a6b-bbd5-f4483e714876/62190112561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1eba98-2bc6-44f6-811e-f91f4c6190ef/32532645329.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/fawadariz.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_off0000b475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB475 5040 bytes
SHA-256: 1f375d80cd162c7b2c7ed965c1ca8410bccdc9cfa113f6609ab0a5e09e118f2f
font_01_sfnt_off0000c56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56C 10188 bytes
SHA-256: 56810cd44ba205c88907dbe921d2c49dd10e605750d6ce47b64a8562e12095df

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