Malicious PDF — malware analysis report

Static analysis result for SHA-256 c746ff8a10ef82ea…

MALICIOUS

PDF

81.6 KB Created: 2021-02-12 21:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c1501e5c99872b366994a91761a0e8b SHA-1: 98e50674436a7c96ff41f9d2d9ecae90c9cd9344 SHA-256: c746ff8a10ef82eaae5a28a79efd987a3979077e660e908100734af1273d2c89
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 0.9995

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://druttle.ru/wix?keyword=rwby+summer+rose+fanart PDF link annotation
    • http://promoocaoameericanas.com/26326650513teosr.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/hd_bengali_movie_site_for_pcbgxga.pdfIn PDF document text
    • http://vipogomer.iblogger.org/comment_avoir_un_ventre_plat.pdfIn PDF document text
    • http://vusikudezewoteg.iblogger.org/zejupezanuraninikiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5fc81a9a1c2ca.pdfIn PDF document text
    • http://lovechat24.club/rizenulanezesafiacg9y.pdfIn PDF document text
    • http://nutristrike-shop.ru/can_you_play_tennis_by_yourselfsxb39.pdfIn PDF document text
    • http://livecopyrightverification.com/871058136305ug5.pdfIn PDF document text
    • http://aslixan.com/macromolecule_comparison_table_answer_keya41yd.pdfIn PDF document text
    • http://bluebadge-support.com/samoxuvotirovaleplrsc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487927/normal_5fe5798d3aa92.pdfIn PDF document text
    • http://autokenn.com/cholesterol_guidelines_20134spvm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fakeduzit.rf.gd/anti_arthritic_activity.pdfIn PDF document text
    • http://gidepajujida.rf.gd/23922310209.pdfIn PDF document text
    • http://kalogoraretupo.epizy.com/building_pathology_report_example.pdfIn PDF document text
    • http://litekedewiv.rf.gd/game_dev_tycoon_development_stages_guide.pdfIn PDF document text
    • http://xafedanurene.rf.gd/zefelonukewexajajatutaka.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/fusutufobesoxivofekojafu.pdfIn PDF document text
    • http://jaxejibowanub.rf.gd/jupipagagajaz.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/criminal_background_check_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/baby_betta_fish_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/dezubumivoranol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 5056 bytes
SHA-256: ec03c3320b44c8413a540d233345880b560df90f0c6ab43b3906d64721781806
font_01_sfnt_off000107bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 10332 bytes
SHA-256: 8eff82d112a4c4f6ea53a6624623d6d361774c995adb067d3ce1ef1b145e500d
font_02_sfnt_off00012b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B27 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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