Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b4fd356bb83621…

MALICIOUS

PDF

62.3 KB Created: 2021-02-15 06:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0c4b02d6a89497bff57abcb621fe4241 SHA-1: 8fb6531c75324648bd80150d06cea18e33e6f349 SHA-256: c8b4fd356bb8362132d82d376cdfa1cf52bc7624cf3cbd2c3dc85be619cf42f1
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://maypoin.ru/aws?utm_term=rto+vijayawada+vehicle+check+report PDF link annotation
    • http://nicechange.space/best_bunkie_board_for_platform_bedqeryn.pdfIn PDF document text
    • http://spoonnumberone.xyz/softonic_for_windowsgo4lj.pdfIn PDF document text
    • http://palejep.22web.org/pazemipiz.pdfIn PDF document text
    • http://best-store.club/kozofapojotamivaumbus.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/Mhfiai7/toy_story_smash_it_mod_apk.pdfIn PDF document text
    • http://reduslim-shop.website/51711724196lpn63.pdfIn PDF document text
    • http://gdztut.com/bypass_android_7._0_samsungqyzzh.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/jWrQnHj/71226577706.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/0nijpFw/39891616391.pdfIn PDF document text
    • http://koolmaxt.online/performax_miter_sawnxz34.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/Tbohcgh/juzatod.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/jgbsibk/download_map_minecraft_pe_ios.pdfIn PDF document text
    • http://tixshopclub.fun/hernandes_dias_lopes_download0sr77.pdfIn PDF document text
    • http://freedate18.xyz/navadeal_ant_farm_castleqwccd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://monuwuwotivonil.epizy.com/budget_tool_app_android.pdfIn PDF document text
    • http://mevedokepovi.epizy.com/command_line_mysql.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/43584162574.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/yii2_file_link.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_off0000b825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB825 5384 bytes
SHA-256: e30f064a19b11bc42a548bcb08666cd33924919e55112ed342e28890afb9c73b
font_01_sfnt_off0000ca96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA96 9920 bytes
SHA-256: 272f9cc5073752a918c77e1d79eb1e181cd03c5301aa2d8d06c0d2d827612903