Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce6c7da94b66e8d…

MALICIOUS

PDF

77.7 KB Created: 2021-03-18 14:06:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 88faea9cdf07b9cdb129af25d5380228 SHA-1: 32404c5f061cec3a4cb40ff844becf069781ed8e SHA-256: 4ce6c7da94b66e8deaa2058cf75e66f1759a32747ba45aadd55b6847dc011f98
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=2007+chevy+silverado+1500+factory+service+manual PDF link annotation
    • https://zawivipesanupi.weebly.com/uploads/1/3/4/7/134724715/dabutilufu_nakolamazafub_sanebarusibuji_nitafi.pdfIn PDF document text
    • http://extrameets.fun/the_hardest_would_you_rather_quiz_everv3iv6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_604d2afc2becb.pdfIn PDF document text
    • http://starkrobotics.org/religious_education_questions0m1tr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_60233989e4dff.pdfIn PDF document text
    • https://gumopokexu.weebly.com/uploads/1/3/0/8/130814161/tamapovujezeroka.pdfIn PDF document text
    • http://catsism.com/disassembly_3d_free_download_pc_windows_7516p6.pdfIn PDF document text
    • http://bio-ita.fun/94440032720p05dw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_60365bc865378.pdfIn PDF document text
    • http://iuts.space/94563752695jhpo3.pdfIn PDF document text
    • http://negozio50sconto.info/zalosudlqbsu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_603ac21990ac4.pdfIn PDF document text
    • http://busibear.com/seramejugimgr0i.pdfIn PDF document text
    • https://galinigogazefu.weebly.com/uploads/1/3/2/6/132695851/domoferabab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_600b167f263bb.pdfIn PDF document text
    • http://classicalnaturally.com/borrowing_money_from_a_friend_contract_templatezt7gi.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/75ad5ed7-a0f0-4c81-9ddc-4fa21957c1a7/samsung_galaxy_s5_t_mobile_unlock_code_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853debe1-b021-4137-a496-8c4f32c6d71f/interview_questions_and_answers_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac167252-d8a0-441f-b6f0-c810c36182a6/jagivomidetipepoluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ceeaec-ac08-46b7-bbb3-4f43cf99b73a/how_to_set_up_graco_double_stroller.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_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 5856 bytes
SHA-256: c0639f51a270d8622c3e8e1fa53dc25f6577ad83b849a930c905f5a1d6b3113c
font_01_sfnt_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 10552 bytes
SHA-256: 0c3966f040e87715099a2954031478c08ca0858fbde430247fe131973b657e2d

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