Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af81f16a9d67f94…

MALICIOUS

PDF

74.2 KB Created: 2021-02-22 01:15:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 129be4a610663e07b57b55c549d5c969 SHA-1: 52c6c1b69e423f2c9b5d7dd4bd754383b2294df5 SHA-256: 3af81f16a9d67f94e35a52e90beb8ababba1c8cf9b10d5dbc208cb7b155f83e3
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://jacksth.ru/aws?utm_term=stock+market+books+for+beginners+india+pdf PDF link annotation
    • https://cdn.sqhk.co/jabosuve/geiihaC/4_pics_1_word_game_answers.pdfIn PDF document text
    • https://rapinawenag.weebly.com/uploads/1/3/0/9/130969945/6913602.pdfIn PDF document text
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/dijonubotaxeseripex.pdfIn PDF document text
    • https://runizupila.weebly.com/uploads/1/3/4/3/134320381/90b4192a.pdfIn PDF document text
    • http://bewalunokonu.22web.org/flannel_sheets_queen_set.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/gdb68Ze/action_truck_parts_ponca_city_ok.pdfIn PDF document text
    • https://fefezotexarij.weebly.com/uploads/1/3/4/2/134265886/ganozeka_zodemofigagez_pipudu_levuxumevedavat.pdfIn PDF document text
    • https://cdn.sqhk.co/dirujigowag/hegdcji/71734860849.pdfIn PDF document text
    • https://kofutisidizeb.weebly.com/uploads/1/3/1/4/131437743/310f38e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojopugoput.epizy.com/cognos_report_studio_cast_date_format.pdfIn PDF document text
    • http://topasirerawo.rf.gd/junior_android_developer_salary_uk.pdfIn PDF document text
    • http://lexojowal.epizy.com/57705400941.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/23497669409.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/b_arch_drawing_questions_with_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/mutopo.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_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 5748 bytes
SHA-256: b38862f11b4263136fe5b62766cf05aefdc8a85aafdb64d42e7e44f34a5478c9
font_01_sfnt_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 11080 bytes
SHA-256: 2a2806a90d901ae1752d8fe8e547739507fff9a70fe8b1cfd3d17f1b38255ed9