Malicious PDF — malware analysis report

Static analysis result for SHA-256 5212d7988df984a0…

MALICIOUS

PDF

75.6 KB Created: 2021-04-08 02:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9a669f42cbe838e8b3fee45c1115e5d2 SHA-1: e710bc485fa979820d597fc73fef0c52d5f74c7b SHA-256: 5212d7988df984a044b2db4a06781c920dcc19b6032c792b8b002bb8b699f355
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 0.9998

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://soxebez.ru/strik?utm_term=what+does+yellow+triangle+mean+on+nissan+altima PDF link annotation
    • https://cdn.sqhk.co/wujakegu/Kijbjfd/piraguvavubifivukiwod.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/summary_of_anthills_of_the_savannah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_60090f84a5a9a.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/autobiography_sample_for_college_students.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/Jjhkhfw/nail_biting_gif.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/biblia_cronologica_download.pdfIn PDF document text
    • http://organic100.fun/trigonometric_ratios_milliken_publishing_companyavexq.pdfIn PDF document text
    • http://wajofima.mywebcommunity.org/71805910655.pdfIn PDF document text
    • http://thedouche.xyz/lalof1xvr6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5fca94e751cee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/92317005601.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/vilomolagep.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/boxster_987_buyers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/how_to_put_conair_clippers_back_together.pdfIn PDF document text
    • http://vakorizu.epizy.com/52849803025.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/fafabujorepimanilujef.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/77922101759.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_off0000e86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 5448 bytes
SHA-256: 9c0ff5a63a997ed63176ca0d0a0fa767c324b3ef7caa84258a0e6c4c99dc71c5
font_01_sfnt_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 10916 bytes
SHA-256: ae9a34f2fda3049ae20a8de19f64978ffcecd08fe72724fbb20da97eb83df391

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