Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc53db62c9dde86…

MALICIOUS

PDF

79.5 KB Created: 2020-11-19 13:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 39b3ed63508ad17a56fdec291e94ab1a SHA-1: da236541223d4a51eede56d46a91b419aa40dc67 SHA-256: 0fc53db62c9dde8638349d8b02b38c4a5a1e9ee41ea21844d83c7ae4f467cb6e
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 0.9996

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://trafffi.ru/strik?utm_term=wacci+kirameki+translation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5f9dc4304e685.pdfIn PDF document text
    • https://rusunesezov.weebly.com/uploads/1/3/4/3/134309606/5441589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5fa160abe99b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_5f926eb10c5c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5fa51320ea2c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5f8fa21f54df1.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/wufobibiwuze_tumulixifirub.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/1582369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f8fdb46077a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_5fa0e0cfcb2c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f89afcd723ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a8f7c45e-a05d-4d95-bab5-df6c125d6932/64607628877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d6601a-650f-428a-89db-2453ac6a09ee/download_roms_gba4ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c59d236-aef1-401b-b8c2-494be9174ee4/samsung_galaxy_core_prime_stuck_on_metropcs_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83306f25-9835-45e0-be63-42acb9488f3b/sse_step_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f45a1b5-36c6-4777-bd04-baf17fe7b463/vazopatasu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB67 9980 bytes
SHA-256: 015d52143fed6724dbb6575676b4b8a1ff83b8dd3ea2105f471e465038c5446a
font_01_sfnt_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 4808 bytes
SHA-256: f10984c56411aa583cbd558c538dbaba60d9224efb7919d35fea7d6c97d802db
font_02_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 11300 bytes
SHA-256: be7e94ca54065b8a25c0b7a7a053a569366f771f113332c01a7842cb82a1fdbb
font_03_sfnt_off0001224d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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