Malicious PDF — malware analysis report

Static analysis result for SHA-256 1663e41526380f2d…

MALICIOUS

PDF

81.5 KB Created: 2021-05-26 03:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a94bea91fd1fe49fad0a7865fe2db161 SHA-1: 1727a3e994b22b57c793d3785648f215d1c63812 SHA-256: 1663e41526380f2d9c90a8d7d0f6b25ddc2e8c1da12d69334710704f93fcd9b0
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=can+loud+bass+hurt+your+heart PDF link annotation
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/zemire.pdfIn PDF document text
    • https://nimizinimaji.weebly.com/uploads/1/3/4/7/134703428/9dc0044b398.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/lasawavu.pdfIn PDF document text
    • https://tinuxapesizagi.weebly.com/uploads/1/3/4/4/134440362/210673.pdfIn PDF document text
    • https://bexokibuki.weebly.com/uploads/1/3/2/3/132302940/253190.pdfIn PDF document text
    • https://tonavibete.weebly.com/uploads/1/3/4/7/134748981/tebujuwop.pdfIn PDF document text
    • https://dunudodijozu.weebly.com/uploads/1/3/0/8/130813966/9468797.pdfIn PDF document text
    • https://jubaluwaruzazux.weebly.com/uploads/1/3/2/7/132740890/dedidirezixexi_masejomowida_kuxezafade_sefuputetamone.pdfIn PDF document text
    • https://kigijizinelojuk.weebly.com/uploads/1/3/4/8/134848952/7049701.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
    • https://s3.amazonaws.com/radubozufiwo/goodnight_moon_lyrics_go_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3614f71-9947-4b2d-a155-f41fc4035dae/3269170659.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/64242969459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee78ed4-b90b-4565-8b55-0fccc8a9bed1/felefebativovufadosurita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca6b42c-0b5f-4f7c-aaee-9e12250bfc7c/zadufojir.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/general_partnership_agreement_texas_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f92b0e-9f7d-4abf-9cac-5dab10c4de1b/mesabezepixu.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/13535781553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35e8dfd-045f-48bb-8754-5343a142250d/spivak_calculus_solutions_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/samsung_grand_prime_plus_battery_price_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/drinkwell_platinum_cleaning_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/how_to_dark_mode_microsoft_word.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_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 5012 bytes
SHA-256: 22a48c1ca8ccf24e5dea40780319ac91cd78e1a7e6624f485df8df80b337f9a8
font_01_sfnt_off00010393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10393 10920 bytes
SHA-256: 36384cebe38e099edd0181408aaf1c659706a7bae35413ea1e05cf1139d2062b
font_02_sfnt_off000128b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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