Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3022eb344a4a5c…

MALICIOUS

PDF

68.2 KB Created: 2021-02-17 11:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9edc886f2dc786aeeaf4a5de3535af4f SHA-1: 95cfdc5a5b8ce1e7dd4150cee79b8f3a8e2f35a2 SHA-256: 5a3022eb344a4a5ce9fb874efc79b423a9fd88277657f1f2baec580e463e122b
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=isgt+2020+delft PDF link annotation
    • https://pefeduvoxonix.weebly.com/uploads/1/3/4/0/134017609/sizoterujejo.pdfIn PDF document text
    • http://milansit.space/casio_g_shock_rangeman_gpr_b1000_manualm7ala.pdfIn PDF document text
    • http://nout-sale.site/tasiwetujovuzumemokadi9jgna.pdfIn PDF document text
    • http://sehq.xyz/chi_chi_s_medium_salsa_nutritional_information0jj5i.pdfIn PDF document text
    • http://pshcomonhere.xyz/daraz_apk_for_android_4._1._2jdnht.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5ff616f987e72.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/3416e7f.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/ggmhcjb/did_it_on_em_meme.pdfIn PDF document text
    • http://draiwenstore.online/happy_birthday_to_you_sheetal_imageouui1.pdfIn PDF document text
    • http://asia.kiwi/70587835588t5jzd.pdfIn PDF document text
    • https://batozovij.weebly.com/uploads/1/3/1/4/131455337/633698.pdfIn PDF document text
    • https://totibevopomuv.weebly.com/uploads/1/3/0/8/130813722/db6ab.pdfIn PDF document text
    • http://fredo.run/mafamabazaleztm0.pdfIn PDF document text
    • https://tinozewadewuxa.weebly.com/uploads/1/3/1/3/131398338/viwelekovuder.pdfIn PDF document text
    • http://datab.vip/vapojamebogimowx86kr.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/1VAjE72/wavagirufasodedup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459174/normal_5ff4fad5a30fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cfce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCE 4980 bytes
SHA-256: c7fae070c4509906332c6503b2b666d2a39922a62276efcb9e92b1bbf9fefaa8
font_01_sfnt_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 10284 bytes
SHA-256: 05901d7e57016d3da9aca5e28d45c8ec0ea59af087e0958f609eddad635117c6

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