Malicious PDF — malware analysis report

Static analysis result for SHA-256 e543f5f5caf2a7d6…

MALICIOUS

PDF

67.5 KB Created: 2021-02-23 14:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6404519263d03ac17c40079971ac9b2f SHA-1: 9f06f2bcf7e3ce03c313370f6d9d7acbba47d2c2 SHA-256: e543f5f5caf2a7d6dc39d6c0bafaa7170c8e8a07de0d9795a859fa250d55df26
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://leonvi.ru/123?utm_term=nand+and+nor+universal+gates+ppt PDF link annotation
    • https://cdn.sqhk.co/romilononove/fxmU6L4/4_pics_one_word_game_free_download.pdfIn PDF document text
    • http://mowuvivof.22web.org/jejubizopowanuxezagogezo.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/ifidG27/90650277748.pdfIn PDF document text
    • http://topcreditcheck.info/manual_de_terapia_cognitivo_conductual_con_nios_y_adolescentesjrpp8.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/j8yIiaJ/islamic_alarm_ringtones_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487386/normal_601e99776ed30.pdfIn PDF document text
    • http://counterman.ru/64792635117jiqkg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_601c9a0ba742c.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/uhjhbji/chicken_drumstick_soup_nz.pdfIn PDF document text
    • http://idealica-official-it.website/jugufulofuzow0vj9.pdfIn PDF document text
    • http://zzzmmmmejjj.space/moog_sub_37_manual_german1isbq.pdfIn PDF document text
    • http://milansit.space/futatawudetixej825i.pdfIn PDF document text
    • http://techanomic.com/asus_z390_e_gaming_manualikg4o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_602e10d849c77.pdfIn PDF document text
    • http://dsv-trening.ru/macbeth_socratic_seminar_questions_and_answersmex6s.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/ruzaganog/avery_label_templates_5267.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/zigizegupogejaxuvefegu.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/14659124715.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_off0000cc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC08 5156 bytes
SHA-256: c81da8cefaac49d38c3fd0af12107990fcf66bd48301e449e43d4f86179f631b
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 10252 bytes
SHA-256: 1a20e20355de48dc1e97caf7c5d40218bb1e4a5c93e63370015ba2d1610825b3

Open this report in the interactive analyzer, or submit your own file for analysis.