Malicious PDF — malware analysis report

Static analysis result for SHA-256 3370e45dc1f6918d…

MALICIOUS

PDF

87.0 KB Created: 2021-06-13 11:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f5b930df8e5ccda9e0cc5bbf69cbccfb SHA-1: b01feab2973b709f8d3872cb71af533ccaaac6c5 SHA-256: 3370e45dc1f6918d2842c9c8d776a0a60409c9868086b4f0e5f7946443c6dfa7
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://crysiq.ru/pbw?utm_term=101+inspiring+stories+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420586/normal_5fd73e4c9813f.pdfIn PDF document text
    • https://xijozidirosem.weebly.com/uploads/1/3/4/7/134712871/zupopinukixumin.pdfIn PDF document text
    • https://renugukid.weebly.com/uploads/1/3/0/9/130969315/7c3148f3a56a4.pdfIn PDF document text
    • https://kipofazusaf.weebly.com/uploads/1/3/1/3/131379409/2990860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_604f77eaed498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393020/normal_5ff3c866b3435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_60546ba2ac4f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_60b8366f0d342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499023/normal_606d98824d997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495684/normal_60290648b941a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_604497679f62b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499329/normal_5feb7cf784b79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410975/normal_6007df03b23a2.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/fcf93ea5-802f-46d1-b302-f163a91a7e3d/proof_of_service_by_mail_california_civil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3827ac5-2676-41d4-b215-bd2f66527f12/how_to_pray_the_greek_orthodox_rosary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96863b32-295a-4987-ba74-31c2b4aa3f9d/how_to_setup_nec_dt700_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b89ec5-e783-461e-be56-e6ae4d0aa596/xokakezusajuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a24ec1-25f8-487d-ba2f-6b7af201f0cc/islamic_childrens_books_free_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d294621-6c5f-449f-95c9-19d12ae78555/ponukutojudumo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001080a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080A 5188 bytes
SHA-256: 9c11d6825d93594820378bfe204d923e51cb1c4e3c8a29ac2843b49408a4b5aa
font_01_sfnt_off000119c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C2 11412 bytes
SHA-256: f9fa2a2670f2b9d685f38224617b92b2c07ae01c0cf8f904190145c7c12bca12
font_02_sfnt_off00014091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14091 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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