Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bfac84755709be…

MALICIOUS

PDF

75.8 KB Created: 2021-02-27 09:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecdb761f88a1f90e531261f1dd9dd7c4 SHA-1: e71a611ebb90780fb7de36caa0969b12b481074c SHA-256: 02bfac84755709be69f2ed4b84eb5ae13f369a4faa5fae52424088faeb4f7b8c
126 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/aws?utm_term=how+to+say+happy+birthday+to+old+friend
    • https://cdn-cms.f-static.net/uploads/4378406/normal_600d86a7ef682.pdf
    • http://vaxiliwu.medianewsonline.com/tizesimusijabe.pdf
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5fe91b7d26edc.pdf
    • https://static.s123-cdn-static.com/uploads/4446923/normal_6001dd7cf2149.pdf
    • http://nipokaxa.getenjoyment.net/dunurununotoxu.pdf
    • http://vorogaxafu.iblogger.org/mbti_types_traits.pdf
    • http://muzibatixabu.mypressonline.com/honda_6500_generator_manual.pdf
    • http://gepuladetageton.22web.org/nubovenulevedofulufanisos.pdf
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5feaefeca8a4b.pdf
    • https://static.s123-cdn-static.com/uploads/4463529/normal_5ffbc19e757de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/padanivozeb/list_of_railway_minister_of_india.pdf
    • http://vidugozu.atwebpages.com/bovetafewajefafomupojuxat.pdf
    • http://gakilasefit.myartsonline.com/hp_color_laserjet_cp1215_toner_reset.pdf
    • https://s3.amazonaws.com/sukobogixe/theory_of_inventive_problem_solving.pdf
    • http://jifujurudale.epizy.com/ejemplo_de_monografia_normas_apa.pdf
    • https://s3.amazonaws.com/xukirizugukugi/blender_2._79_shortcut_keys.pdf
    • http://renedutej.rf.gd/lesson_7.1_skills_practice_slide_flip_turn_answer_key.pdf
    • http://pasukebufi.rf.gd/archbishop_blanch_sixth_form_uniform.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb44.bin
247f5b25b86a33de3fe4526bec6030f613a89ae08111e715c4b50d13bde38ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 5424 bytes
font_01_sfnt_off0000fdba.bin
e5935f30497f717866b7aa3379de4e526056d9727d311914953dbf802a02c7ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 10544 bytes

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