Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ea23a0f8adaca3…

MALICIOUS

PDF

91.6 KB Created: 2021-04-05 12:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 75b8540c064002408fbfd706351cfab8 SHA-1: 2275f5359c253da2022c378c417d3f4cbc0572cb SHA-256: a7ea23a0f8adaca3a36f049106e250f509fce90001649993974b46e8df8f9142
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior, suggesting the document is designed to drive traffic to these external sites. The ML classifier and ClamAV also strongly indicate maliciousness, likely related to phishing or malware distribution.

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 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://resalured.ru/123?utm_term=rising+storm+2+vietnam++for+android PDF link annotation
    • https://cdn.sqhk.co/juxerawabuf/RjfKJRI/69807237930.pdfIn PDF document text
    • https://tazidafojunuxu.weebly.com/uploads/1/3/3/9/133997245/gexomomikudiwab_jekakesupawu_juxam_jogiresolaz.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/KYifjVk/gepipotoxifas.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/7iaRjiT/rusobigiza.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/8hhgdhd/sifadefuxipunukinuwaki.pdfIn PDF document text
    • https://tobotegitemusir.weebly.com/uploads/1/3/4/6/134651307/c633c56f21f.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/Seiihfn/seduxajugerejadunibipowo.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/hcjYLDw/95298672059.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/AjfWifX/torn_meniscus_treatment_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofovam/EhggLhh/50798793781.pdfIn PDF document text
    • https://cdn.sqhk.co/zebasama/jK4RYie/download_game_build_a_bridge_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/3D2PFId/telugu_movies_tamil_dubbed_free_download_hd_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/g0ygdhh/best_2d_vector_animation_software.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/tuzofumuzikagukebi.pdfIn PDF document text
    • https://jareruko.weebly.com/uploads/1/3/4/3/134348829/5156986.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/gjijehh/panukusepitevunajebubituw.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/jaLjdfd/mtn_momo_reversal_code.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/big6hfU/lock_screen_ios_13_hd_wallpapers_1080p.pdfIn PDF document text
    • https://cdn.sqhk.co/kawaniroti/hV9C5zC/dewuzifujofupuzux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da1bb0f-23a2-46d9-89a9-8fa5daf9c460/20244155111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05c0231-4387-4efb-bab7-72e30377404e/dowawewarawurofosuzasisix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147610af-1d6e-454d-a799-0ec3513be05a/swann_security_cameras_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e00f18d-4b58-49bb-8d20-934bf0430c25/writing_without_teachers.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_off000127e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E6 5392 bytes
SHA-256: 7048924059fcbc911412be7e587fe1047d3de4c3c9811cbdf4de6c41da26bc60
font_01_sfnt_off00013a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A32 11492 bytes
SHA-256: fc160f5f21be7e3cbf5bc04bfd9b441ca00926e7a949e47f6f9a417b1a6d5125

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