Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0096780bb19b74…

MALICIOUS

PDF

72.3 KB Created: 2021-06-14 21:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f243090b04cae5fc3d36dab982628ebf SHA-1: 9167cdc4d16af589cb29c78e5512538f6f989df1 SHA-256: 7e0096780bb19b740d5a2a723cfa5470f9f52ddf20017d313ba481a3d2c7f77b
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 0.9997

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://drafthe.ru/pbw?utm_term=top+tv+live+app+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490519/normal_5fd95938242cf.pdfIn PDF document text
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/fbf4742d638d0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408863/normal_6001c6951cfaa.pdfIn PDF document text
    • https://fadejumiz.weebly.com/uploads/1/3/5/3/135349507/5172996.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4403824/normal_60b1fe1d923eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_606a227dd6aa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_6044fb36ed5ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_60c5611bec063.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4412408/normal_60b07e2db99da.pdfIn PDF document text
    • https://semotifivunadi.weebly.com/uploads/1/3/1/3/131380295/9125420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_605ad678e0cf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_60bef9210f431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5fd0eae236ecf.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/2be6fc0d-6dd1-40cf-92f7-6fa551e0d3b3/how_does_a_tractor_dynamometer_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb762398-9eda-407e-9856-c07a710a1179/what_is_the_formula_for_sum_of_geometric_progression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b45eb3e-a6c1-416e-bb20-ecd3e640026a/80478403754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc30f58-73e7-4255-bd3b-827133a473a9/soil_mechanics_and_foundations_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c6e963-b3a9-4ed3-b372-a6d2959715b1/asmaul_husna_arti_dan_manfaatnya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562543ef-babe-4d66-bf54-aa85ede558f0/30932183197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b214de-150a-48ff-aa71-4606f2045dd9/puwamojizadebarefizadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8146363-dbd5-4328-8277-5581c5d83a10/dujanojexosunujajisigi.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_off0000defc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 4780 bytes
SHA-256: 5a2ff478f72a068606551ec79d6e59b5a0f7d73a4dd99dbce838c660b727cc66
font_01_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 10720 bytes
SHA-256: 317abfb66fb2afe058cc11bd612eb865ff868bca22fea47151019f5e296cd459

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