Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc707dafff1aad8…

MALICIOUS

PDF

76.2 KB Created: 2021-05-30 06:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 08708668d6802a86972a75d3a41f1084 SHA-1: dd6381cab5ab09c8fe626435df631c24c5105cd0 SHA-256: 7fc707dafff1aad8b58b56cc751fc4ce211eff1b53a60ec26344863ae11a9949
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://fokemale.ru/strik?utm_term=little+drummer+boy+lyrics+by+pentatonix+download PDF link annotation
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/6956978.pdfIn PDF document text
    • https://wanesoxe.weebly.com/uploads/1/3/4/3/134369563/kefem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416510/normal_5fe303497b715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_605124b574d6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_6015d552c2ac2.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/jatimu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479673/normal_606235e210a11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fe5fa2cafe34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_605805e1dc7c3.pdfIn PDF document text
    • https://jebasunegafepes.weebly.com/uploads/1/3/1/6/131637224/jumojawoxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_60004692ec3fb.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/908e17ad-5d4d-43ac-b0d0-819cef8796ad/suxateninunileb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3c672c-2e66-4699-b13b-3646f0215b80/subscribe_to_twitch_channel_with_amazon_prime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec1ef02-9516-4cbd-8951-6a00e8a5a688/gross_national_income_per_capita_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4045d3f-6c52-4c41-b329-05d48cf63607/kowoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d356d1-a2f9-4409-9579-4a0a005a1b72/will_there_be_a_book_5_of_the_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6459cfa8-6c85-43b4-9831-8fd984904e9c/lunar_3_maus_5_oz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c8c6f7-4e48-4400-8b78-0f812644478f/tiburukogutoxemegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a768c9c-5658-423d-9899-a9842dd7d0bc/66088817938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad76e1a9-909e-40e7-9afd-2ac60b826201/boturujowibasizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9395599c-bfef-45f2-8764-6c4aa7a697e4/pdf_converter_powerpoint_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a13aea-43c2-431e-b794-6c42b659803c/takoxenesowomuxafit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23cf4761-adff-4401-b115-437b4298b045/how_to_program_lg_magic_remote_to_bose_soundbar.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_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 5564 bytes
SHA-256: 74f9241d2187d4e81588a4e77587c7faef8aae039b5a20172a6a39203af7c268
font_01_sfnt_off0000fdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD1 11248 bytes
SHA-256: e3ad99e254258f530d5326a44b9e523479cbc6f1c658e23345c30b169fa3a189

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