Malicious PDF — malware analysis report

Static analysis result for SHA-256 b723da748854c5d5…

MALICIOUS

PDF

69.3 KB Created: 2021-02-18 21:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a8d99bc4afdb9336f13393391fcba466 SHA-1: 863b3a061ecbe6ea70400b88d6351706ff03cbca SHA-256: b723da748854c5d5a9afb9233a080448e81ac791b2ccfd2bca3c266878b2e361
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://seumenha.ru/wix?keyword=kappa+alpha+psi+metal+coat+of+arms PDF link annotation
    • http://fojozefamofu.22web.org/11586940291.pdfIn PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/wimezupew.pdfIn PDF document text
    • https://cdn.sqhk.co/losopodelim/atCjjXD/quran_translation_in_tamil_audio_free_download.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/rekudozamazi.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/heRjbUD/shell_v_power_racing_team_shop.pdfIn PDF document text
    • http://jowitut.iblogger.org/africa_a_modern_history.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/nuvifudovab-wotuwapuka-zedonofovotoken-musizabodirira.pdfIn PDF document text
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/ead22218.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/zimomasotadakiv-dukojepuma-figuwejodibite.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/domegagowevag/chemistry_questions_for_class_11_with_answers.pdfIn PDF document text
    • http://sefatefa.epizy.com/figure_legend_guide.pdfIn PDF document text
    • http://zaninenuj.rf.gd/abc_song_for_baby.pdfIn PDF document text
    • http://kipurifer.epizy.com/92015841458.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_off0000d27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 5224 bytes
SHA-256: 1a179a8a608615524c7c953420a2a60b6ab7ef69b4c989f380fdbc7ce1a77ca1
font_01_sfnt_off0000e420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 10540 bytes
SHA-256: 0320734ba683a25a4351d529bad05f5a0ec43e6991a7f6bd56db6d0a8feb0ce9