Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef26e23c7f3371d…

MALICIOUS

PDF

71.9 KB Created: 2021-02-13 03:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 578fc3ea52acea65feab4f25a50de93d SHA-1: 52a6a87d355a45a7a7e269d0849c83991d1b08da SHA-256: aef26e23c7f3371d47523d27c6c1c7da944bd7b1038c03de86604c3dcef52b08
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://yafferge.ru/wb?keyword=calculator%20app%20in%20android%20studio In PDF document text
    • http://apparentlyopt.com/78661504339en4kb.pdfIn PDF document text
    • http://bitsracing.net/gewevudoputelapukinemewb2x4m.pdfIn PDF document text
    • http://mirror-x.org/lords_mobile_battle_of_empires_mod_apk5qp82.pdfIn PDF document text
    • http://kinokaiff.space/816512564412tz3y.pdfIn PDF document text
    • http://9gusevshop.space/oldboy_2003_english_dubbed_watch_onlinefsd76.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/53190736472po27r.pdfIn PDF document text
    • https://zoxexakaxikat.weebly.com/uploads/1/3/0/7/130739387/nebojudonezelum_vigivarebijun_limopabede_rixekoj.pdfIn PDF document text
    • http://portkamesto.site/biugo_magic_effects_video_editor_mod_apkeo78o.pdfIn PDF document text
    • http://ca-manalapan.space/second_interview_thank_you_letter_templateibkfl.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/catering_logo_design_templates_freej9bmr.pdfIn PDF document text
    • http://lighttravel-ng.com/26936930771o8bvt.pdfIn PDF document text
    • https://fularoxu.weebly.com/uploads/1/3/1/4/131452806/3f22282af3ce.pdfIn PDF document text
    • http://bonus332.site/laziness_in_the_bibleci5al.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://biwajitakawa.epizy.com/88074398407.pdfIn PDF document text
    • http://bopunuzas.rf.gd/88020553296.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_off0000de74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE74 4972 bytes
SHA-256: d42de4b1ab21fea974fbb7f49fffa0a84ad287df8d4685407aceb24d47816412
font_01_sfnt_off0000ef62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 10368 bytes
SHA-256: 3b275799425cfd7b085cbe50bcc0e1ba5593e2ed24967ab636f2411b594235e2