Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1ea6dbdeb10895…

MALICIOUS

PDF

88.4 KB Created: 2021-04-01 07:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c34ebaef762620325badf1add822c4f5 SHA-1: ea6657e0f0f08bebc274f8ecd8a53452710ac750 SHA-256: 0d1ea6dbdeb10895d83b9a2ecafd8ac397c3335c742617713e124bfe8406c7c8
186 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 0.9983

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.
  • 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://ponafet.ru/strik?utm_term=why+did+the+spanish+armada+fail+essay+ks3 PDF link annotation
    • https://nasejanebuxilas.weebly.com/uploads/1/3/1/8/131856105/eb3f674c49.pdfIn PDF document text
    • https://zemedabumudog.weebly.com/uploads/1/3/2/7/132712209/5287766.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/anorexia_causas_y_consecuencias.pdfIn PDF document text
    • http://rfs.team/touch_the_wall_missy_franklin_full_movietwqds.pdfIn PDF document text
    • https://jotevalosovem.weebly.com/uploads/1/3/4/3/134385082/dc899b0521.pdfIn PDF document text
    • https://tokoposejod.weebly.com/uploads/1/3/1/3/131380771/369380.pdfIn PDF document text
    • http://zenaxudoriw.mypressonline.com/aachen_tourist_map.pdfIn PDF document text
    • http://nulatapukedu.scienceontheweb.net/binary_number_system_notes.pdfIn PDF document text
    • http://ourfanz.com/73345809285emjvu.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/8b3f65228e.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/6605000.pdfIn PDF document text
    • https://notozovurex.weebly.com/uploads/1/3/2/8/132814393/6768070.pdfIn PDF document text
    • http://zootime.store/los_trabajos_y_los_dias_resumen_cortoobsla.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/masunusufi.pdfIn PDF document text
    • http://lg-supportteam.com/gulitorivalomexr3g.pdfIn PDF document text
    • http://realwockyc.info/383829187009cyc2.pdfIn PDF document text
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/lexen_fubemagedowuj_lozevijuporofu_xadagebuve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/71a311d8-9424-4ff9-be44-8919533ad0d4/programa_de_estudios_2011_guia_para_el_maestro_secundaria_matematicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aad19ce-aab7-4b06-9820-839a24942333/aashto_roadside_design_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb1aa34-5949-4e9d-ac18-4006b89245d2/4465886404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f0bd95-8129-4aee-80e8-0a8629eaa2db/47907478548.pdfIn PDF document text
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_e65d75a535f84facad9a42f281c86a13.pdf?index=trueIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_2153f52507ca4237b60de50c544771b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d73fa9-da1c-4fbf-aa22-559c9bfa8929/wumuwalosa.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 5300 bytes
SHA-256: ce5417da3738c5a96d679ff22215ba2dd8675d6b5bde970976b8ba3aada2135e
font_01_sfnt_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_02_sfnt_off00011e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E44 11008 bytes
SHA-256: d4c6e9b9068645f9151b504ae06a73eb9d9cd521745c70d91aa06d0a5f579f2f
font_03_sfnt_off000143a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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