Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fcf6c58e723d39…

MALICIOUS

PDF

68.3 KB Created: 2020-11-10 21:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cec9916233128293f7a4ccc0c3bb5c4c SHA-1: 65944978cd5cf98dbe4e7026017e7038193adb32 SHA-256: 15fcf6c58e723d39557d5ee7838f86d7b53e61392b33c9ff9eb1ca58a1470514
186 Risk Score

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
  • 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.
  • 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://traffset.ru/wb?keyword=the%20ugly%20duckling%20book%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f8b6792a9746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_5f9de86db9bc3.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/kuvepitamajewu-safufoxo-pipazixi-wewaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_5f8fbfd8bf8a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f9df8008b19e.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/b647ab554d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5f8ea24798ee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f8737badd249.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/pujilexizewanutinu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/busixakowun_zefisuni.pdfIn PDF document text
    • https://diminulagiv.weebly.com/uploads/1/3/4/4/134489960/833012.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/2037999.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/kalunidolafokum-woferapa.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/nemafu/fejok.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/list_of_confidential_informants.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/spyro_the_dragon_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/ohio_commercial_drivers_license_manual.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_off0000ce9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9B 5188 bytes
SHA-256: 8a47cb62f723f9f25254a76eabe8b39bf3e463d2d73e1196ff94fdd0052bdaed
font_01_sfnt_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 10656 bytes
SHA-256: af2131e3cf98adff76608ca8929d9d977e88f818128a8f6da90e92596992b654