Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b62d74537c2e852…

MALICIOUS

PDF

79.5 KB Created: 2021-05-18 19:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d39360142a874e881321105b752f8a48 SHA-1: c8ad6d8fac8dc620615e42f91b78b334ebeb8530 SHA-256: 7b62d74537c2e8528e0dae9105001f2a573dc0b6754693f5b1b69140591a45ef
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. It contains numerous external links, including one to 'https://botokaw.ru/strik?utm_term=udf+dosya+a%25C3%25A7ma+program%25C4%25B1+indir', suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature.

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://botokaw.ru/strik?utm_term=udf+dosya+a%25C3%25A7ma+program%25C4%25B1+indir PDF link annotation
    • https://zomijozefabeten.weebly.com/uploads/1/3/4/6/134636393/590e207cd15.pdfIn PDF document text
    • http://bapuvirovoko.22web.org/88075283885.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/free_premiere_pro_template.pdfIn PDF document text
    • http://fukoxonezadanom.22web.org/36970990571.pdfIn PDF document text
    • http://pemutoguxo.66ghz.com/answer_key_in_science_9_unit_4.pdfIn PDF document text
    • https://zojezuma.weebly.com/uploads/1/3/1/3/131382028/kimupojeje-ronenegubobej-jozufemamimaw-lasijojogeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gizimup.epizy.com/android_autofit_textview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0fb751-b4b7-4c24-9b94-31e42b0dce56/cs_lewis_books_mere_christianity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cdd5b9-f785-48f9-810b-1000085769d3/gakum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0d13b3-7e0e-4f0a-b37c-2905ef725249/56355153376.pdfIn PDF document text
    • http://lugorigarotari.epizy.com/9th_grade_math_worksheets_with_answer_key.pdfIn PDF document text
    • http://gigogapa.epizy.com/backpacking_rucksack_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5332df-5e0d-4435-922f-dddb85d12090/falikabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a592bad-7c0e-4342-8506-5e0727244889/pokemon_sun_and_moon_switch.pdfIn PDF document text
    • http://situfixumuvefom.rf.gd/kijalidajaf.pdfIn PDF document text
    • http://pemisikozawefa.epizy.com/counting_protons_neutrons_and_electrons_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61595fe6-e40f-40ca-979c-0bc630d7a728/zenamemadisevemow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d418a864-f64d-44c0-b8c6-be0ad512f3ca/prentice_hall_grammar_workbook_answers.pdfIn PDF document text
    • http://gumonak.epizy.com/baptism_of_holy_spirit_and_fire.pdfIn PDF document text
    • http://vavesimor.epizy.com/delete_zoosk_account_on_android.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_off0000f317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF317 5636 bytes
SHA-256: f5a24218a10bcb69e03a0fdf74320929b25061211eb03736299870b4ecc432ac
font_01_sfnt_off0001063e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063E 12780 bytes
SHA-256: 7d4ed7e526f762775932b7ca6a2d0697f0b364f45e5c467d3a915f6d809e31bf