Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ad6856afd8f02e…

MALICIOUS

PDF

80.9 KB Created: 2021-03-14 01:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 317467b4ae9c7569c820f7096d711190 SHA-1: 93d54e30b0d54237f9f0ed4e7934136fc40b7a5d SHA-256: 03ad6856afd8f02e7e03c4848656290aacf2b780579e2f8b95aa9db4be5161eb
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://crophysi.ru/123?utm_term=last+cloudia+beginner+guide+greenberg PDF link annotation
    • https://cdn.sqhk.co/posojuvapono/Zhhgigh/recharge_rotring_rapidograph.pdfIn PDF document text
    • http://rifivejawix.22web.org/men_s_eyebrow_shape_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_60184dfbc22dd.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/hereditary_script_font_free_download.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/excel_vba_array_formula_example.pdfIn PDF document text
    • http://xupevagadozojad.22web.org/nattamai_tamil_film_video_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493221/normal_6039e6ae8e932.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/ejihf0m/merge_shapes_in_powerpoint_2013_not_working.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/biblia_de_estudio_john_macarthur_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/hgml0T7/15475294350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fd0b68c15766.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_a974cab41e7244d399dfd0286364476c.pdf?index=trueIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_68cd5b6d4d944f9d89cd0e14cab9e2d6.pdf?index=trueIn PDF document text
    • http://wafugid.epizy.com/13137675971.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_b26ba783bc484b2680231104846dfe75.pdf?index=trueIn PDF document text
    • http://lonedosebazuli.rf.gd/tuperedegu.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_739e52694a9d461cb63a261ce95f2050.pdf?index=trueIn PDF document text
    • http://xevorerokune.epizy.com/juvumazavajajasas.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_9583b4a841584dd7b9c51e0cb1b7b2e5.pdf?index=trueIn PDF document text
    • http://sivumokevidosib.rf.gd/zolajexelifamofewam.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_off0000fecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECD 5188 bytes
SHA-256: 2d7fd075e13dc7ad67f1ac9eeafc7924cd1202bde86a81fa2fe9a1a68d933847
font_01_sfnt_off0001107d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107D 10584 bytes
SHA-256: 6d095b354657cab5e68b1d97ac2b40bb54853c77dc21935d144cf6a1e95d6094

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