Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f1a61678d36f32…

MALICIOUS

PDF

70.8 KB Created: 2021-01-29 21:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4b0caa90bf03614bb34d26a33971e8de SHA-1: bcb736347eb2ff079f7fa3f632b1474e4ec817da SHA-256: a8f1a61678d36f328a2669bde6446bbe5914b0c99efae34939cd7d515329b8c8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jottigo.ru/aws?utm_term=bitter+moon+1992+movie PDF link annotation
    • http://juzajikadig.22web.org/47451137373.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/iep1ifu/miduxe.pdfIn PDF document text
    • http://bigowet.xyz/616928487806er3c.pdfIn PDF document text
    • http://fupuwage.22web.org/fumizugoperilisapetivux.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/fhcXkqr/nojodefaselaxodabenesawe.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/ggIiesQ/61365117494.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/iggfSgf/fx_sound_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/lupejatuwi/hh0ijdw/3d_virtual_pinball_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/W3hjRji/easy_whipped_cream_frosting_for_cake_decorating.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/PjihieC/fishing_clash_codes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dalonirutufitad.rf.gd/back_formation_morphology_examples.pdfIn PDF document text
    • http://kesekerezox.epizy.com/temowivege.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/92309126658.pdfIn PDF document text
    • http://lupibewexuzu.rf.gd/bypass_icloud_activation_tool._zip_free_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/hyponatremia_treatment_guidelines_2019.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_off0000d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD790 4860 bytes
SHA-256: 501b45a23e66666d134ce2721bf33183137474e228365a9c511e681b7fc7b9cc
font_01_sfnt_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 11568 bytes
SHA-256: 599901618837a7255aa7debf884fc7a93b961643b0fcdb9dc8de0fb5d13b0e0b