Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a52134bbe7c8e2…

MALICIOUS

PDF

77.1 KB Created: 2021-03-14 21:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 21a10bf06a0e990e5fed6bf389491415 SHA-1: 977ed601898096763e93f60d72a1bb16f9fbc621 SHA-256: f3a52134bbe7c8e2bb294700d1e123704ec51606570836bdf118ff1637ba82a6
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 0.9993

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 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://lozipotod.ru/strik?utm_term=mit+google+maps+route+planen PDF link annotation
    • https://zedijonen.weebly.com/uploads/1/3/4/0/134018258/5193451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5fcf963fcf385.pdfIn PDF document text
    • http://govakokes.22web.org/matthew_hussey_text_him_first.pdfIn PDF document text
    • http://1pokypki.website/blues_rock_guitar_lickstz84v.pdfIn PDF document text
    • https://bafuselowazela.weebly.com/uploads/1/3/5/3/135318440/pubofisupul-goxufikazajo-susukikak-geruxuxok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427828/normal_5ffb7b40a2bf7.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/masarasit.pdfIn PDF document text
    • http://sis-paypal.com/duxiriluwuniregefoh830f.pdfIn PDF document text
    • http://shlifovka-pol.website/bold_italic_font_freeuyfp9.pdfIn PDF document text
    • http://infonewsuk.site/8015227460b8426.pdfIn PDF document text
    • http://gravkamen.ru/what_is_the_gospel_of_wealthze9c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5fdb5c7f1deea.pdfIn PDF document text
    • http://kisagek.22web.org/xozumuwi.pdfIn PDF document text
    • http://construt.site/bd_passport_application_formnekqf.pdfIn PDF document text
    • http://gakmancreatures.ru/jitituz9tv61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417528/normal_5feb07ce37423.pdfIn PDF document text
    • http://verification-help.business/773093539020yb0d.pdfIn PDF document text
    • https://lekomitigukajar.weebly.com/uploads/1/3/5/3/135345412/3de9f5d5376f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakerubigama.epizy.com/xidojuvitugeboto.pdfIn PDF document text
    • http://vapasiwivomod.epizy.com/vexuliweg.pdfIn PDF document text
    • http://notilud.epizy.com/android_graphics_meme.pdfIn PDF document text
    • http://minirulo.epizy.com/pcsx2_windows_10_32_bit.pdfIn PDF document text
    • http://dupowoza.epizy.com/53276394568.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_off0000ef5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 5144 bytes
SHA-256: bb07b71030dd15d5a5d8d17d95d9f4b422a81e5d89f7bcd56fae82e64743098b
font_01_sfnt_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 10696 bytes
SHA-256: e864614623be37b77e031c34ebde9b48675370bf29712cde5c9d5023eb7990c1

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