Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f34c8974940e0c…

MALICIOUS

PDF

69.5 KB Created: 2021-05-22 08:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a2c899a57cd63d7ffae1a87798f02016 SHA-1: 1a68edc40fe0337251669a59852e2da1c5531c66 SHA-256: d6f34c8974940e0c3b5fcdac621f3b0fac4a19139c8888e8b81c6d2d99bb831f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/strik?utm_term=o+para%25C3%25ADso+s%25C3%25A3o+os+outros+epub PDF link annotation
    • https://nifazupu.weebly.com/uploads/1/3/4/5/134507595/tizasosubof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_60590fc37d31a.pdfIn PDF document text
    • https://zexivavu.weebly.com/uploads/1/3/4/8/134872555/naderux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475852/normal_60169458dc38a.pdfIn PDF document text
    • https://waxopudiva.weebly.com/uploads/1/3/4/6/134695928/vejutukora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_6059f2c1a2a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_6059c98241e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462688/normal_605cb34fb7aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fd9bac97e652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_60449744c36d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5ff345d09ed5e.pdfIn PDF document text
    • https://denafeferigo.weebly.com/uploads/1/3/0/8/130874231/55057ef749.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/vofadoloves/afasia_motorik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926aeb66-5da4-4bb1-b3a0-2bb4480415fe/semuwimetugoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca84de05-d477-4c63-ba09-8f8d4db695a0/disability_support_pension_rate_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/xugabal.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/jewigiforapezajejed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d6909c-bef3-4cfa-9696-30c61866b373/95283924258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cf9b24-4aba-41f4-bfcc-d2e34c2f22b4/vitubol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7221af70-17e3-4abd-8965-174d099f5e38/vukutagutogogovuzogazu.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/apne_tv_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/how_to_fix_kallax_units_together.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/the_5_languages_of_love_what_are_they.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 8

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_off0000d166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD166 5320 bytes
SHA-256: 4460d8c9840e7692f924f7e12c389f07643c27fc10bf5868f9714e6ca0816f41
font_01_sfnt_off0000e2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EF 11536 bytes
SHA-256: be6af18053476d084e4b459f5fb74328623f29b6c5cbbf53da47382a94ffa986

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