Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e34f339621bd328…

MALICIOUS

PDF

136.9 KB Created: 2021-04-01 02:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9c81c5caf2f6088ad4b3bcfb57211ea6 SHA-1: a3a620dcf5369263a79ada937ac2d71fbfb24d8e SHA-256: 2e34f339621bd328e597bd7a6b9fb0d3318aaac6a4ce76d28a2c8b708bbff500
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, with one pointing to a suspicious domain 'lozipotod.ru'. Heuristics indicate this PDF is a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The ML classifier also flagged it as highly malicious. The presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/strik?utm_term=what+are+the+requirements+for+delta+sigma+theta PDF link annotation
    • https://cdn.sqhk.co/viwitukaz/jalv9jd/bully_scholarship_edition_android_geography_2.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/libros_de_fisica_basica.pdfIn PDF document text
    • http://labincom-med.ru/kebiwebe0u0wd.pdfIn PDF document text
    • https://dibufasefeduvit.weebly.com/uploads/1/3/5/9/135975636/7824970.pdfIn PDF document text
    • https://rasaputale.weebly.com/uploads/1/3/5/3/135323831/nagezixawipodonuwap.pdfIn PDF document text
    • https://xibabajawaxas.weebly.com/uploads/1/3/1/3/131398380/a16e397dac873.pdfIn PDF document text
    • http://lapivakop.getenjoyment.net/xiragisifan.pdfIn PDF document text
    • http://natlab.ru/19566419037x61f5.pdfIn PDF document text
    • http://zavulibalox.mypressonline.com/bsc_math_notes_calculus_chapter_1.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/VghJPhg/fandango_cinemark_bolivia.pdfIn PDF document text
    • http://axacheat4.xyz/fesuwudajawuvule5zbqg.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/heiamjb/thunderdome_gt_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/jat4HFG/movie_hd_apk_for_samsung_smart_tv.pdfIn PDF document text
    • https://gugekomu.weebly.com/uploads/1/3/0/9/130969097/1014752.pdfIn PDF document text
    • http://arendaavto.taxi/eventide_h9_algorithms_manualc9sxj.pdfIn PDF document text
    • https://likixolokezixi.weebly.com/uploads/1/3/0/7/130738950/4787297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wutogugej/what_is_an_example_of_a_just_law_today.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/tecnicas_e_instrumentos_de_investigacion_cuantitativa_segun_autores.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/fekimego.pdfIn PDF document text
    • http://medexode.atwebpages.com/61024285873.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/expert_c_programming_deep_secrets_1st_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ce9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE9B 5340 bytes
SHA-256: 4bbdd6a982654f7e2126d49194e1514dae11941a605b825700ffc1333c335712
font_01_sfnt_off0001e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0A9 11576 bytes
SHA-256: 9ac6dadaf7273fae16bb2f90921ed4e351b1d867ffebf5de92063ec68f06fe5b
font_02_sfnt_off000207a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207A1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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