Malicious PDF — malware analysis report

Static analysis result for SHA-256 c303de3a2f43787d…

MALICIOUS

PDF

81.2 KB Created: 2021-03-20 14:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 35cd9cd865b940c1afee4114bc8ea4cf SHA-1: 51da5909b2fc86cfe23ecfd14c82490dded7c3a6 SHA-256: c303de3a2f43787d3f8f00b7f34a1962ba73835d57af1e32f2c2ad48330e309d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though partially obfuscated, contains a title related to furnace ignition issues, which is likely a lure. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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+won%2527t+my+oil+furnace+ignite PDF link annotation
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/zevijipavolukujup.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/hgjfEja/pdf_annotator_free_portable.pdfIn PDF document text
    • https://dikosunasalimob.weebly.com/uploads/1/3/4/3/134363034/boguraxagat.pdfIn PDF document text
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/8789934.pdfIn PDF document text
    • https://lomagifotoji.weebly.com/uploads/1/3/0/8/130814873/de23609aa2742a.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/egjxicS/pezovidet.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/hcO7Kjj/35231067887.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/d_and_d_delivery.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/7296962.pdfIn PDF document text
    • https://cdn.sqhk.co/zokirafuka/gKXgjgg/best_design_portfolio_website_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/juzivadareka/2zhd9ha/uniden_scanner_bc340crs_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/YFn0gjb/musynx_song_list_switch.pdfIn PDF document text
    • https://detidigem.weebly.com/uploads/1/3/4/4/134491675/6aef64dbf038e5.pdfIn PDF document text
    • https://dajitogaxafolix.weebly.com/uploads/1/3/1/1/131164176/cd07c.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/doeTwMn/zigzag_pizza_oceanside_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/5AHhb35/constitucion_politica_de_guatemala_1956.pdfIn PDF document text
    • https://kubazabuz.weebly.com/uploads/1/3/4/8/134885093/5a12bd.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/9UmidaT/81328488632.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/bose_remote_control_code_for_samsung_tv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_62742ff900e0470eb1b4288b8f7442d0.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_290a19b08ed8409da64a233dc5729a61.pdf?index=trueIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_ca0455f44a1947d0a55370f7d0d4885c.pdf?index=trueIn PDF document text
    • http://zajupulavofawi.myartsonline.com/what_are_the_major_types_of_production_processes.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_off0000ffd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD9 5356 bytes
SHA-256: a1471d4c0e628b5b38a28c60127bc963948cbd51a87f848a35a8f05db00fb302
font_01_sfnt_off00011212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 11100 bytes
SHA-256: 38808510cc4b0ad3ea7295175b44f2fd4ec5e60342adc8a05b4dbb1fff7ca7ad