Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d045f660535c45…

MALICIOUS

PDF

79.9 KB Created: 2021-03-11 02:28:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c1c0da036411ed1b43e28001c144c647 SHA-1: 2a6501c71fcb39262fa0cdcb8e1410b976dd4f2c SHA-256: 54d045f660535c459748438f97f3aea69ba7acea63cedd4065165f4dd0f0ee9e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://lozipotod.ru/award?keyword=anatomy+physiology+of+kidney+pdf PDF link annotation
    • http://nutosuvitiraj.scienceontheweb.net/fovomadi.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/7694ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393363/normal_5fec11d0ec3bf.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/how_cryptocurrency_works_for_dummies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391335/normal_5ffca24dab6dc.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/7046033470.pdfIn PDF document text
    • https://waragorejitise.weebly.com/uploads/1/3/0/8/130813548/e0b030a16d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_6013eb7fbea05.pdfIn PDF document text
    • https://jepunitapo.weebly.com/uploads/1/3/1/0/131070437/9298349.pdfIn PDF document text
    • https://pakakisokuz.weebly.com/uploads/1/3/1/3/131381756/2dd911.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/lowitidusezin.pdfIn PDF document text
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/tudedinekuzo.pdfIn PDF document text
    • https://wofudanizosaxig.weebly.com/uploads/1/3/1/6/131637209/df39aba84d.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
    • http://wudemexa.myartsonline.com/48185999236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea14e7be-80d2-4624-a38f-ac06247a0749/xaremunefetix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2839f0-19a3-4b45-8662-8b2219f158b6/xasudiluza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cdaf7c-ba83-47e1-bf7e-ceab7f9cc154/cuanto_es_150_gramos_de_azucar_en_ml.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154f73c9-3b8b-402b-8c76-9fefdf8ad285/vajode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf02372-9e2e-4443-953c-22cfd56b41d5/are_watch_straps_interchangeable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f867af80-2359-4ffd-9fc7-f5629637dbae/how_to_reset_zap_remote_outlet_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc6a044-3e75-411e-a434-33c8b0381562/blackjack_strategy_card.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_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 5300 bytes
SHA-256: fa9a46aafde6ce9516e59b4de4761fa7498726d681ea0d67cfe6cd9f01a5f4d7
font_01_sfnt_off00010050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 10428 bytes
SHA-256: 794c72682b7d53f5df8695a0369df0240b2bd3d1007700600d780514b7a8e79e
font_02_sfnt_off000123ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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