Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe71ad338da86fd…

MALICIOUS

PDF

78.5 KB Created: 2021-03-21 20:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8a903014d1d4793b046295965b045a27 SHA-1: b84ae600c8585052f0fc0f2483050b930c9eb27e SHA-256: cbe71ad338da86fd6b13eeea5a3cf3de52f720737839ef1a9d3e9d5606743488
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=body+parts+in+french+pdf PDF link annotation
    • https://rirujidina.weebly.com/uploads/1/3/5/9/135957349/mibafaposad_ratewi_tefafefagone_ruvizovipaparu.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/igfhbN0/xozokijepuwunelu.pdfIn PDF document text
    • http://storeeuro.info/vogibovepawukuz9ygiu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448339/normal_5fdfdae1e6bcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408476/normal_5ff1c066680d2.pdfIn PDF document text
    • https://sivipekuz.weebly.com/uploads/1/3/4/5/134596285/20f4492297d7e7.pdfIn PDF document text
    • http://com-signto2.xyz/aylesbury_high_school_sixth_form_open_eveningpmtm7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_6013086b882b6.pdfIn PDF document text
    • http://gachihyper.xyz/gokosisodilaxabovuzia1w8d.pdfIn PDF document text
    • http://garderob-podolsk.ru/iso_9001_certification_process_in_indiax2hgd.pdfIn PDF document text
    • https://paluwewokob.weebly.com/uploads/1/3/2/7/132712057/tokemekifu_tupedaj_rakoneruforura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476569/normal_60357b7f52392.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/Nif9ice/shopping_iguatemi_brasilia_df.pdfIn PDF document text
    • https://gesunewa.weebly.com/uploads/1/3/1/4/131438127/7f207509a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_6036d8c4f2872.pdfIn PDF document text
    • http://forexgeeks.net/3157406010psf16.pdfIn PDF document text
    • http://blockingscenery.com/bose_quietcomfort_15_replacement_ear_coversdpmzb.pdfIn PDF document text
    • https://cdn.sqhk.co/pozazoji/RsiaMih/28941189175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b45847-b5a5-456f-811e-54751bd84cf5/osha_10_construction_training_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67405db1-b56a-422a-b98c-e1444364d5d4/nugukuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40af8a1f-48b7-4900-abe5-5d738f6a9392/kimuvisisinovi.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_off0000f755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF755 5360 bytes
SHA-256: d44741c270a6e21f83e413ab07402d568b81a2144088722bf01f4a7cdc2bdf35
font_01_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 10312 bytes
SHA-256: 7ea3a501de63be926ed16bd75ac50f30cd61b6cf4b21b453ff08c329a1ea5428

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