Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4c715fd6b07c5e…

MALICIOUS

PDF

80.4 KB Created: 2021-04-04 14:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fb76d927d676d3cdf5994c5bbc11357 SHA-1: 756807124c8601c6553c683e918df7188612962a SHA-256: df4c715fd6b07c5e4f8a65cd9e640fc2d3e9a20c3b3974fd4479a3c34a909f48
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 document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/aws?utm_term=multiwii+gui+2.3
    • http://vekuzebis.22web.org/gavuwatuzevituxisapavin.pdf
    • https://fikanofuzak.weebly.com/uploads/1/3/1/4/131438747/8f0ea8092.pdf
    • http://rafale.store/paint_sprayer_for_cabinets_and_trimyu5ms.pdf
    • http://naturalm.space/20315291209d4u73.pdf
    • http://tuimag.ru/soxojituvawigebumexila0mhcv.pdf
    • http://libralab.digital/how_many_episode_will_that_time_i_got_reincarnated_as_a_slime_haveoduk0.pdf
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/negizipanonig-zoxetutilij-zuzeloxojaxa.pdf
    • https://gagopono.weebly.com/uploads/1/3/2/6/132681316/zusutegomol_basuxojitewisif.pdf
    • https://cdn-cms.f-static.net/uploads/4464067/normal_5fd89189ba8a5.pdf
    • https://tusuwijajibu.weebly.com/uploads/1/3/4/5/134517525/wiwan_forobigige.pdf
    • https://cdn-cms.f-static.net/uploads/4444882/normal_6045fd22961bc.pdf
    • https://static.s123-cdn-static.com/uploads/4403688/normal_5fee4798042e7.pdf
    • https://cdn-cms.f-static.net/uploads/4454436/normal_5fd706b7d1299.pdf
    • https://vojonabof.weebly.com/uploads/1/3/1/3/131383251/583136.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bavidoripo.epizy.com/33631994210.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/bissell_9595a_cleanview_bagless_vacuum_with_onepass_filters.pdf
    • http://zabidogadifosis.rf.gd/cimbrian_font_free.pdf
    • https://s3.amazonaws.com/bopuxosavubare/proform_995_sel_for_sale.pdf
    • https://s3.amazonaws.com/zalomi/banana_de_pijamas_musica.pdf
    • https://s3.amazonaws.com/werowibovezoje/reset_panasonic_viera_tv_remote_control.pdf
    • https://s3.amazonaws.com/xoguwavosuje/55509145308.pdf
    • http://xaduneraxoden.rf.gd/how_to_clean_jenn-air_downdraft_vent.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f192.bin
60d19530928ba6fdaffa3ae45371e5a53d92de8bba13a053773d77ca6c2ccbcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 4344 bytes
font_01_sfnt_off0001007b.bin
d349ffbf1befb7f61e3d41019cc1cd72098992abdd8d685005b53901f39b83d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 11132 bytes
font_02_sfnt_off00012675.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12675 4324 bytes

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