Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e60d5d479653e25…

MALICIOUS

PDF

78.7 KB Created: 2021-05-28 13:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 45a23fc552fdaafe9fa80d166e8de510 SHA-1: 8fc48070eeb926e24219fa3110e1b5c2314a3e53 SHA-256: 4e60d5d479653e256766e5d0bbf43527dc1a5eb321c4a8adade72d40ac1fa81e
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/strik?utm_term=the+human+centipede+2+movie+download+300mb PDF link annotation
    • https://gixefizavemo.weebly.com/uploads/1/3/4/1/134108956/1400556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_6030a230e68e2.pdfIn PDF document text
    • https://xogowabixebeva.weebly.com/uploads/1/3/4/6/134612916/felafapewu.pdfIn PDF document text
    • https://xekuruwagimutuz.weebly.com/uploads/1/3/2/6/132696141/latarugaf.pdfIn PDF document text
    • https://zuwuwuxi.weebly.com/uploads/1/3/4/8/134883554/9507862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_6011513ea6ac1.pdfIn PDF document text
    • https://fuvenaxumegiga.weebly.com/uploads/1/3/3/9/133999500/5445878.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/1645a0b5-a2e7-48fc-be41-a5ec6e58200d/how_long_does_a_mobility_scooter_battery_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d2ea62-67fd-449d-a0f9-9a98c19eba3b/debemipewewevot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fead00-2353-4720-b610-f8eaec571b27/gnostic_teachings_what_is_ego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec53d14-a865-4fc1-93c9-ddfb33788dbf/what_age_is_chest_size_26_inches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb6df7a-46ff-4da0-ad4d-1e14920424c1/8163044601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b89ea13-ba3a-4317-80a7-1723f909aded/i_am_malala_book_summary_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54bd2f0-492a-4526-aa5e-bf9efc6a2abf/jesitelitilaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7946d2f6-9c88-449d-a7b8-4de3fd66d5af/dell_optiplex_3010_mt_i3_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00b1db7-6f42-4281-8f6c-9269e62aa691/wonibitezagabuzaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062d6f18-a969-4f8d-bbdf-159d76820558/42942539275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a56c01-e35c-45ec-abb5-546f26f3972d/descargar_pruebas_psicomtricas_laborales_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2674d5e-cce9-4755-a3bb-8b5cf5ebe3d4/dd_3.5_true_necromancer_build.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_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 5716 bytes
SHA-256: cc6a4a67950b578cc53e36a299357d3c0cee6e007323918d9ed2a4d815db8db5
font_01_sfnt_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 10820 bytes
SHA-256: 59f073365996f428999f1c6c683f8e3532db259aa8e3a67d2febacd3f16ed170

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