Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2bf0cd894347c3e…

MALICIOUS

PDF

80.4 KB Created: 2021-03-28 17:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f2bfcbfdba649731874db99999ee321 SHA-1: c62c6ee0cf8a7bd74adb2477312c664ab92c8a0e SHA-256: b2bf0cd894347c3eabfe993083e9572d5bc54ab6c410c936b42ef923fc7f8867
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded URIs, many of which point to unknown or potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/wix?keyword=deutsch+aktuell+6e+level+2+online+workbook+answers PDF link annotation
    • http://card2card.live/xoraziwimobimijifasomisaji88.pdfIn PDF document text
    • http://fito4ka.xyz/gobobotogarefavi6qq85.pdfIn PDF document text
    • http://bigno.space/25049674701nj4oy.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/eUMy070/kebizopuxanuzibabopabapi.pdfIn PDF document text
    • http://plafond.xyz/jivupigofibotuzamimewz4upk.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/gd2ysig/tiny_archers_2_mod_apk.pdfIn PDF document text
    • http://legko.travel/logitech_surround_sound_speakers_z506_how_to_connect_to_pc4d1pk.pdfIn PDF document text
    • http://mastera-saydinga.ru/2356848666znq1f.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/gephdhc/wrap_rope_around_cylinder.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/ihxhckC/gold_runner_alpine_coaster_cost.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/180547dd-240a-4578-94ac-56a4c3e86275/sixiwepirokifuzusenula.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/59630067576.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/fonozutuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7750c53-55b1-449c-8f9f-1d9a0bb01b72/73967962213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e8d423-e9a2-432d-bd39-57278758c95b/dosokolegurup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41cb4ac-14bf-4489-a6db-278caac3b8b0/boy_scout_handbook_13th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/kythera_artifact_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1dcea3-ade1-4724-8c60-fbbf23d05ee9/doxurovusixifit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d2b841-b9e3-4ff9-9308-151542e894da/41204169548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491edba9-db34-4de6-9c14-4c932f599ceb/samsung_frame_tv_remote_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb761ff0-ccd8-4b49-8746-d2e90a526386/what_is_the_best_cloud_computing_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a2f5f1d-53f0-4ae1-ad36-a10cf467ac65/fadilamezafaxob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e3191b8-a06c-4e7a-978b-4e9634b2ab9a/76878249239.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_off0000f6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 5528 bytes
SHA-256: 5425da4221a59d2a5ebef48ac68a31ced38a1db4ed3394751580c2db8f0dbec4
font_01_sfnt_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 11884 bytes
SHA-256: d7ff4c0e1b437e3cc2582c12294c225dea01ff7e4b4de18aabc96b60ff8934d5

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