Malicious PDF — malware analysis report

Static analysis result for SHA-256 469a5b99abc9dd66…

MALICIOUS

PDF

79.9 KB Created: 2021-03-27 19:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a9cc08803552fcc75fb3cc8b3e84fdb4 SHA-1: 1a10c7a41b8d604acb1d9922b7337715337c6750 SHA-256: 469a5b99abc9dd668383f2dd5fe2962e11377d46648c7af9159f505955b557f3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=js+interview+questions+and+answers PDF link annotation
    • https://bagesasadav.weebly.com/uploads/1/3/4/3/134383367/nipizekozavi.pdfIn PDF document text
    • https://lajejajutabi.weebly.com/uploads/1/3/6/0/136050508/4372544.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/bilufafirador-fabazumena-tewevirotisen-gogakojim.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/79108671585.pdfIn PDF document text
    • http://foripekomufotir.mypressonline.com/poverty_reduction_programmes_in_nigeria.pdfIn PDF document text
    • http://craftsmansmetics.com/totuzinubeizess.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/fejivuxoninozur.pdfIn PDF document text
    • http://silkhfig.bid/harry_potter_original_hardback_booksj0i1r.pdfIn PDF document text
    • http://pamatidela.getenjoyment.net/xelisotuzugejigefo.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/pusolefosex/61566503604.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_5005d33b886e412ba6b813866cdee5eb.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_3c3b90ff066c4f4a89c365bbead344ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawovojo/video_editing_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/noc_letter_format_for_appointment_of_auditor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c90ce97-910c-4c35-9fcb-6d4628505320/sony_ps_lx300usb_turntable_speakers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46bacfc-212d-4930-9ab7-ebfa31e8050c/verbos_en_ingls_conjugados_en_presente_pasado_y_futuro.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/94040230407.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/nusukorozixi.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/fuzetumike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88aa0dd-11fd-426d-b278-484f8f60f207/37412024471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99224625-81ce-43e5-8bfc-5d3e6f968e96/panasonic_cordless_phone_manual_dect_6.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deadf2d2-eda8-4d8d-9102-b77581cb8079/how_to_win_betting_jackpot.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD94 5052 bytes
SHA-256: 7366f152d0f648ef37016daec027bc54c79064b0c58dfe737070bbf1a8aebbb6
font_01_sfnt_off00010ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE2 10688 bytes
SHA-256: eea8923c2a6c5e54d8c91ef26149bd41d158b73b00e998d3789a401a19c35a20

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