Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8ae8fc01a626b3…

MALICIOUS

PDF

73.3 KB Created: 2021-01-26 16:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4327f8d60fd02d9ed5ac0ec2b0e0a10c SHA-1: 9a1bfccd8634f848f2d4aa7f1d94e49ed7bf1878 SHA-256: 7a8ae8fc01a626b3e22297972ee5bcb236898c093e7ee40104de3831cbf0930c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=adjectives+and+prepositions+esl+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5fd204d21f3d8.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/ruwataka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464850/normal_5ff4be545045d.pdfIn PDF document text
    • https://vetuvixix.weebly.com/uploads/1/3/1/4/131437813/5484921.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/5gdrhcz/assassin_s_creed_4_black_flag_naval_contracts.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/sejapiba.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/46fd9e923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413865/normal_5fec73a10aaaf.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/wutoriwegogulowojuru.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/ieyichj/portal_gun_mod_for_minecraft_apk.pdfIn PDF document text
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/5204782.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/gfrvXgj/streamlabs_vs_obs_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/vamapoludi/y4Khjhc/mobizen_screen_recorder_for_lg_record_capture.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/fbbd6.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/5b3308b49d.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/baxunaf/freshers_party_banner_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/cinema_4d_r18_plugins_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/aashto_m_145_espaol.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_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 5444 bytes
SHA-256: 47da40c3ed0912baf30208516c782dca35d59fdcfac4e12722c769749b18a5ee
font_01_sfnt_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 10760 bytes
SHA-256: d6dfdb4e023d68e818542c61b83e9a7bb476d0e71831a2b6b926aab11bfe12f6