Malicious PDF — malware analysis report

Static analysis result for SHA-256 616a5e1e15594f47…

MALICIOUS

PDF

78.1 KB Created: 2021-03-09 04:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7d3285f31691e010856c67ef7bee940 SHA-1: 1cb20a0ab0d1bcb0e566b6abc0153855d17f0176 SHA-256: 616a5e1e15594f478d09d2f7b6c558b1392bb9d4ddcfbca40400328a2f39a941
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs that redirect to potentially malicious domains, disguised with keywords like 'ikea kitchen catalogue'. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it with high confidence, suggesting an intent to direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/award?keyword=ikea+kitchen+catalogue+2020+pdf
    • http://naxajogilelog.medianewsonline.com/pakuzunedizebazikesas.pdf
    • https://cdn.sqhk.co/jipodipotaj/hscqheM/90464890368.pdf
    • http://lenuvivureropi.scienceontheweb.net/54499129710.pdf
    • https://cdn.sqhk.co/sowodopevew/Kii1Wjh/eve_echoes_map_icons.pdf
    • http://vudasuti.mygamesonline.org/1779370744.pdf
    • http://lupelisizi.medianewsonline.com/rufubunegazuwemunesasax.pdf
    • http://xozowilozoga.mywebcommunity.org/wapaxupimot.pdf
    • https://cdn.sqhk.co/lozuzupadis/hhkhgjf/moxusutitanonezu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/87ad06c8-120a-4832-b97c-9b820d346108/dometic_ct_single_zone_thermostat_reset.pdf
    • https://uploads.strikinglycdn.com/files/27247f38-dd88-4f97-a28f-c28146727059/35947573112.pdf
    • https://uploads.strikinglycdn.com/files/4d6ba174-6a78-4168-bc70-2bf4bb7a457e/ridexoraranili.pdf
    • http://pozijawikubinun.myartsonline.com/jomejod.pdf
    • https://uploads.strikinglycdn.com/files/1936aeb1-b8a7-4a49-8979-cd4e3fc9ba57/lapimupugolewixadofokub.pdf
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_eff134a0776c4a8090f889b746822a54.pdf?index=true
    • http://tigagatu.atwebpages.com/example_of_micro_expressions.pdf
    • https://uploads.strikinglycdn.com/files/d2bf679c-eba6-420f-9287-e84e09055fa0/96689786957.pdf
    • http://xobeminal.atwebpages.com/bewefatetajo.pdf
    • http://pelebirepopo.onlinewebshop.net/punjab_election_result_2020_download.pdf
    • http://gubawakelu.onlinewebshop.net/jexupemamegukavutiratuwup.pdf
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_d76e7e8088454f5d8730c47478eb6564.pdf?index=true
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_2c91d9c095de4a6c98b95faab8adb378.pdf?index=true
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_fa18400be8504e0c841c59c219356e16.pdf?index=true
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_e2912dbc081f4e059df61d2ff370b7a0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b1.bin
8ec452316f5014a7fa6c80e442032e6c226ed6328f1e646e4e9cf0ce3cc88ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 5416 bytes
font_01_sfnt_off00010728.bin
fad4e42c3a633f80055c7ac3e5900ac732fcdc612a81cbfcfaa07687a19db44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 10476 bytes

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