Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74d1467c54be1f4…

MALICIOUS

PDF

85.6 KB Created: 2021-05-07 21:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 360d658e79a7ad6d56197f834de3d2e9 SHA-1: 57a0552c5cb5ef2782ac4705600e2c6750878b67 SHA-256: d74d1467c54be1f4b49fdf1aae834475edd47ae8c6b2fc889c2fca8a92b2d549
126 Risk Score

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 0.9994

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://resalured.ru/strik?utm_term=vampire+diaries+season+8+episode+4+summary PDF link annotation
    • https://cdn.sqhk.co/duxisabaza/etu1heD/como_actualizar_chrome_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474478/normal_5fc8c55b936ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5fe25c7b57b07.pdfIn PDF document text
    • http://shishkin-seed.xyz/the_travelers_gift_seven_decisions_that_determine_personal_success98o7j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fd1d93221823.pdfIn PDF document text
    • https://cdn.sqhk.co/junuxuseg/fihjieL/luxy_poker-_online_texas_holdem_gamesofa_global_inc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_6025292be7f2f.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/74446046423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_60304c8e04513.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/bjdYhgM/toca_life_city_secrets.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/manuale_dell_apicoltore.pdfIn PDF document text
    • http://gratoramm.website/english_lesson_speaking_activities4f7v3.pdfIn PDF document text
    • http://instasavephoto.com/84814089079x8tot.pdfIn PDF document text
    • http://autolombardpro.ru/police_siren_sound_mp3_download_free3w740.pdfIn PDF document text
    • http://stroymarketmetal.ru/how_to_win_at_the_sport_of_business_free_downloadtdvjx.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/technical_drawing_with_engineering_graphics_15th_edition_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_b08385629f3d487aaf10dfc0a9cb04f0.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_2ddb17834a3f4169a83ba29b40cd916c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b5403a-f36d-4477-aaf5-a3403f04a237/conair_deluxe_compact_fabric_steamer_instructions.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_3d05870925d74042a233d79b9d936430.pdf?index=trueIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_ebf4cc75eb75425bb8d0430eaa6d6def.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ccbe4d-6f1b-48ff-9a21-4321ada8f21f/violin_scale_finger_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a229439-d27f-452e-b0ac-d1ac1cd27601/digital_marketing_school_miami.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_off00011045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11045 5420 bytes
SHA-256: 5c88554604eec5e3bf695ab6f61bc2655abf8400416759f386d69e361e1b0c23
font_01_sfnt_off000122aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AA 11232 bytes
SHA-256: 086f13bbfc5d5a177e0ddb1d473323b400fff73ae0b0c53921e4a1eb50f5ab08