Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d6323085e7af6e…

MALICIOUS

PDF

72.6 KB Created: 2021-01-31 06:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e6c25237d70fbde3776a9ed0a4fc8136 SHA-1: 93cb0495247d32bb7403a6dac92f6a87703de40b SHA-256: 91d6323085e7af6ee4dcf0c7a4307bd013f6b0ba6116554819c4f7ece8f738a7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=knife%20sharpener%20reviews%20america PDF link annotation
    • http://wopafopu.22web.org/netote.pdfIn PDF document text
    • http://takovod.66ghz.com/android_wear_2._0_watches_uk.pdfIn PDF document text
    • https://zikowajemaje.weebly.com/uploads/1/3/1/6/131607239/wipinogudenatisatofe.pdfIn PDF document text
    • http://ropejolun.iblogger.org/rafif.pdfIn PDF document text
    • https://nifevokore.weebly.com/uploads/1/3/1/4/131437532/7428369.pdfIn PDF document text
    • https://durosokikiw.weebly.com/uploads/1/3/1/3/131379956/vorerogivomiwuwog.pdfIn PDF document text
    • http://wizatone.iblogger.org/cnc_machine_cutting_tools.pdfIn PDF document text
    • https://monaxakapivelor.weebly.com/uploads/1/3/1/1/131164425/zavozulakisek.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/gakigivebezeto_gagotuvosamime_muride.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwutamor.epizy.com/lascal_maxi_buggy_board_fitting_guide.pdfIn PDF document text
    • http://gobiburitumeri.epizy.com/peter_jackson_s_king_kong_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/simple_christmas_songs_piano_sheet_music.pdfIn PDF document text
    • http://ramasewo.epizy.com/23871059375.pdfIn PDF document text
    • http://girifatu.rf.gd/virtual_dj_waveform_display.pdfIn PDF document text
    • http://faguvepeme.rf.gd/wotirexeriwigiwikeso.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_off0000de56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE56 5444 bytes
SHA-256: f7c7de4a471608141004090baf250e671ad2ef71d49ee05b33287686f0c9ef06
font_01_sfnt_off0000f0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 10812 bytes
SHA-256: 61fafcfd185e283fcbc8a0205f5fa4824662196cab4a464314b71f2ce3d16ab8