Malicious PDF — malware analysis report

Static analysis result for SHA-256 30456f716e023402…

MALICIOUS

PDF

83.3 KB Created: 2021-03-26 08:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 21c8cb505ac8a410eb0ab733460fd633 SHA-1: eba1a5f53b64fd06948d38a329ba406dc111dfef SHA-256: 30456f716e0234025193b77365f74621bd38a189f6ce7e9c75ad1fca305393b4
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://kuzutuzo.ru/award?keyword=actinobacillus+actinomycetemcomitans+pdf PDF link annotation
    • https://loseseseveru.weebly.com/uploads/1/3/0/8/130813975/bf1c946c87918cc.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/jbKIqhf/72351354500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383689/normal_5fcd7ee41611a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_603a1eee523f5.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/hblijKI/bee_bot_starter_set.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/hdgVwje/sevededilunezuvasalakow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_6031536ff278e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_603d518ece847.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413973/normal_5ffdf3d9c1760.pdfIn PDF document text
    • http://weragefiz.22web.org/wexagobogopalunevuralanod.pdfIn PDF document text
    • https://xatikofaf.weebly.com/uploads/1/3/0/8/130814669/pejak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_60318229c4067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negakibuteno.epizy.com/89304418480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d320b207-97d3-48e7-9e08-669df358558f/26736024604.pdfIn PDF document text
    • http://nisoruv.rf.gd/vlookup_get_value_from_another_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad48f6ce-27b4-4a9d-942b-4add3bc6766e/kiss_the_rain_kalimba_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a235dfce-5126-4e5d-8171-907a90de9f93/25_hp_mercury_weight.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 5436 bytes
SHA-256: 642c3b05ef6ddef4b7ba5832416dfd0b24023edec05e99e0a0b5f91760626ffd
font_01_sfnt_off000101a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A4 12720 bytes
SHA-256: 09ecb07c79afe01084c1c5f9950415c018fcd422a2b1d96d0e7f6be654ae906f
font_02_sfnt_off00012b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4E 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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