Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0029e5d9afe3d26…

MALICIOUS

PDF

81.0 KB Created: 2021-03-24 03:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: accd3d64abbd8d6ea7734acff3e76220 SHA-1: 56df8deb441131321e8d8c3da849795748b8fd66 SHA-256: b0029e5d9afe3d263ee43b45c616840fd29378461335888a643c0aa68b028583
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://pelibifir.ru/strik?utm_term=ensayo+del+libro+la+meta+en+word PDF link annotation
    • http://goldstein.berlin/11237952973s33oe.pdfIn PDF document text
    • http://cookwellbakewell.com/spider_man_hologram_comic_book_valuese1z1.pdfIn PDF document text
    • http://freehookup.xyz/subject_verb_agreement_exercises_with_answerbovpp.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/wuguremapugojenito8.pdfIn PDF document text
    • http://deine-gabe.com/53109148955j894x.pdfIn PDF document text
    • http://testvvd.xyz/pa_cosmetology_study_guideinjxw.pdfIn PDF document text
    • http://fsbsiod.com/analise_financeira_de_balanos9ukhy.pdfIn PDF document text
    • http://buvevevonukaxe.iblogger.org/lepogubif.pdfIn PDF document text
    • http://axecheat9.xyz/16293017711sjg1b.pdfIn PDF document text
    • http://1pokypki.website/32157004321r73gw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_d2f10453b39a499aa8cea15b211f36e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ad6f5f-f9cb-4a01-87ad-9186a7407708/plantronics_voyager_legend_connect_to_laptop.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_c0a48d93e69c42cfbc7d16456a3ba211.pdf?index=trueIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_17556207b1d44550ad83df375f8a9006.pdf?index=trueIn PDF document text
    • http://moxanasaki.rf.gd/advanced_mvc_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf8a33e-1521-4895-be63-6f5be1e8ef69/86590347624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec7031f-515b-4b31-b519-e938f42d7f88/night_shift_jobs_brooklyn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcafada6-1ca2-4f67-b199-4006d630fd56/jane_austen_book_list_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2dceb3-1ffc-4c6b-9168-b21d80a06fe4/naruzemejimuzu.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_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 5260 bytes
SHA-256: dbf27974f3e083fe724c9f6fae2098e09c964c4d53801b3bdc4107d7705fa96a
font_01_sfnt_off00010f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3F 12064 bytes
SHA-256: bf885fa764d8eb0ad00a7a8eaa752edafcc1a313f3b36cc52a0da3c2a613c6df

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