Malicious PDF — malware analysis report

Static analysis result for SHA-256 839ebeb31d2c8528…

MALICIOUS

PDF

73.3 KB Created: 2021-02-26 14:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ef06dd34306342e840724ed7e059572c SHA-1: d1363d316782f4c5d99676528912224d607a921d SHA-256: 839ebeb31d2c8528c8d7a0cc844ca1a1f80c40365e1f42ac29ba4cf666f4ee4d
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/123?utm_term=mfj+939+antenna+tuner+manual PDF link annotation
    • https://cdn.sqhk.co/tenotitur/bBif9Ah/bejoleladavawowaj.pdfIn PDF document text
    • https://cdn.sqhk.co/wogirujut/a9Qg0ad/rovuxu.pdfIn PDF document text
    • http://bamitizelomodil.22web.org/employee_handbook_template_california_free.pdfIn PDF document text
    • http://tiktokfrance.fun/gekerezodurujotami6lf0n.pdfIn PDF document text
    • http://delayikapy.xyz/wazafapuparevetozubemulk0z3.pdfIn PDF document text
    • http://bagajuz.iblogger.org/69230929024.pdfIn PDF document text
    • http://umdtheatre.ru/weather_live_stream_louisiana086al.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/conflict_of_romeo_and_julietbq1wa.pdfIn PDF document text
    • http://tovarzone.ru/264898289404szel.pdfIn PDF document text
    • http://garowige.iblogger.org/46618277699.pdfIn PDF document text
    • http://covid-19online.site/analisis_narrativo_de_la_gallina_degolladaedukx.pdfIn PDF document text
    • http://lnstagrambusiness.com/zulidumayl528.pdfIn PDF document text
    • http://rizuxikasosokeg.22web.org/elsword_luciel_class_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lonozixugixapap.epizy.com/north_carolina_civics_and_economics_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/begopekisapigovexogub.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_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 5136 bytes
SHA-256: c57975a46f23737b3c9eb626f156c9b1640fecd0a5e244c2751d961f689ead16
font_01_sfnt_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 11284 bytes
SHA-256: ffca229b1d23bf48e31069be0ae1e636e4c75e054046c2b1435c6599e8d33740