Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e2e97f2b488e48…

MALICIOUS

PDF

80.3 KB Created: 2021-04-05 09:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9777223379c60653284e7613e3f76b6a SHA-1: 9b493ad71df86e9c979975ca1179e143be9869df SHA-256: c2e2e97f2b488e48b8b88f1595f5277b1ebf9c942d9e8bbf26a3430e0e283c89
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 0.9994

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://vilenefex.ru/aws?utm_term=que+es+relevante+segun+el+diccionario PDF link annotation
    • https://depuxozepol.weebly.com/uploads/1/3/4/3/134377374/f89ead5.pdfIn PDF document text
    • http://lightly.store/breville_smart_oven_pro_tray_sizelk1qf.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/segugadejemob.pdfIn PDF document text
    • http://cashthe.ru/calligraphy_cursive_writingxdap7.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/the_endocrine_system_consists_of_neurons.pdfIn PDF document text
    • http://ru-payment.casa/30285731490yhq6d.pdfIn PDF document text
    • https://nuvosukive.weebly.com/uploads/1/3/4/7/134718285/1078729.pdfIn PDF document text
    • https://nanejebowobo.weebly.com/uploads/1/3/1/1/131163631/losotelir.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/roponudi.pdfIn PDF document text
    • http://musc-media.xyz/549020234534epmu.pdfIn PDF document text
    • http://tanubujurutemut.scienceontheweb.net/zudotit.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/640719a8-f794-48ba-91e9-2fac3570c0a1/lord_i_need_you_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/bride_and_prejudice_mp4_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/97822574231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae45dd6-8cab-488c-bbc1-48e2f117b108/40817275787.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/chamakam_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/biguruv.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/catcher_in_the_rye_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/dudurunonovux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc67913-f220-4317-875c-664e7913c002/28716215650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07afb69b-03f8-4c5e-a25f-9b9d5778906d/how_do_you_charge_a_petsafe_collar.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/sat_practice_test_1_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6298078e-4054-4be3-846d-a320ddc65699/fasixije.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_off0000f587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 5228 bytes
SHA-256: e8be322adb98d0b38dc098bc7e83fb0b054a01de42f8125b9375ebf8f6607829
font_01_sfnt_off00010763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 13508 bytes
SHA-256: 83f47b3654cd22fcdf5d2a41ed7fffff4dea7c45fe356c1fdbe68d7d06359949

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