Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c53ad5c08b4d5b6…

MALICIOUS

PDF

78.0 KB Created: 2021-05-14 06:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7267afb149ecca2ce82d4fbccc263617 SHA-1: db99d27d0d3672f8ca28f33d78c3d0c5b25a2754 SHA-256: 2c53ad5c08b4d5b66d4f49c9b25fddedbb0dca914072bea9b64667274ae426a4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=polaris+rzr+glacier+plow+system PDF link annotation
    • http://igbusinessabouthelp.com/89966724605mgbt5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_60329eeceddfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_601ad4c378488.pdfIn PDF document text
    • http://usesoda.pro/230766004677yxx0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fe6ebac0b303.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/cja8ez4/huey_long_assassinated_1935.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5ff3240f6149b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fd322401ec08.pdfIn PDF document text
    • http://peskomment.ru/3835088038151cc1.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/appsc_group_2_notification_2020_19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_602cff05ecab1.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/cjaQP0M/best_amiibo_for_mario_odyssey.pdfIn PDF document text
    • http://zedateve.mypressonline.com/two_step_equations_in_words_worksheet.pdfIn PDF document text
    • http://paksorond.xyz/mariage_d_amour_chopin_piano_sheetp8d0w.pdfIn PDF document text
    • http://zuwifipenabed.medianewsonline.com/bezudivitufivegubawe.pdfIn PDF document text
    • http://laitlabs.pro/attagasam_video_song_tamilzqq2w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5fd8e34556c7b.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/auhaohg/8995724068.pdfIn PDF document text
    • http://tk-time.site/xiwumajaxibivini5nvk9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5fe88e73e611d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492546/normal_6062375258ee2.pdfIn PDF document text
    • http://stroiline74.ru/kubulifezadaoh380.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxegejuw.atwebpages.com/alphabet_en_anglais_exercices.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/zolel.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_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 5496 bytes
SHA-256: c21ccd12f991a6d9c7ec72da2bc4762862b3436e40f3fce1ed0c3a050c61ccb1
font_01_sfnt_off000100b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 11752 bytes
SHA-256: c005291f7cb6d12a10e814adc6f1ff87b2c08199e7cafe4b46bbdfcffb44e0c9

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