Malicious PDF — malware analysis report

Static analysis result for SHA-256 3633416c7e2dc533…

MALICIOUS

PDF

78.8 KB Created: 2021-05-07 19:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 29e8d68b78b1b47bfc0acd3b9fd21028 SHA-1: 622cdfaeca995bd0047b32a17cfc7af6c2ad3f02 SHA-256: 3633416c7e2dc5333ceec5b8973b9602d410c25794375f2db41e245a028655b2
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with several pointing to unknown or potentially malicious domains, suggesting a link farm or phishing lure. The presence of external URIs and a link farm heuristic strongly suggests the document is designed to redirect users to malicious websites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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/strik?utm_term=el+dador+de+recuerdos+rese%25C3%25B1a+pelicula PDF link annotation
    • https://cdn.sqhk.co/nisisepolo/cGGigij/12115483716.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/bujugasefoli/ojeTgfu/farming_usa_2_all_vehicles.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/lotebo.pdfIn PDF document text
    • http://kieverts.xyz/inteligencia_emocional_segun_autoresr2yr6.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/manual_guitarra_espaola.pdfIn PDF document text
    • http://marketeuro.pro/gapejioyll9.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/dictionnaire_des_antonymes_franais.pdfIn PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/521b6.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/musalezuzinonat.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/fehdLid/2675562559.pdfIn PDF document text
    • http://mozaduz.mygamesonline.org/magic_chef_ice_maker_manual_hnim27st.pdfIn PDF document text
    • https://puxofigu.weebly.com/uploads/1/3/5/3/135347112/6653101.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/hgR8ijD/project_management_meeting_agenda_template.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/gijazejadufopep.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/aneurisma_de_aorta_roto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/avr_atmega2560_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/cateye_velo_8_cc-vl800_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/4076822662.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/straight_cable_color_code_name.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/77339669944.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/tetaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/setup_tp-link_tl-wdr4300_as_access_point.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/bulupujererojavitigofewo.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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 5236 bytes
SHA-256: bf353dd2878bbe2a6dd21067a88bb724b8be499aca4fdac358b0ee8746fa20a0
font_01_sfnt_off00010284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 12668 bytes
SHA-256: 16ded30f9f296195c1b00ee94518e27d5231b6b9be0e3387233b2809ebb97651

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