Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ca98c2694e85e2…

MALICIOUS

PDF

73.1 KB Created: 2021-02-05 18:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7a6d64f8eee1a7f0da86848e6261089d SHA-1: b4102872d539d002733bdfb2b7170548c9a45472 SHA-256: 52ca98c2694e85e2285d3956cd920ee808d8dd6bf9bcd4a2e98377c5e02cf508
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to 'bardia national park' and includes metadata from wkhtmltopdf, indicating it was likely generated programmatically to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/aws?utm_term=information+about+bardia+national+park PDF link annotation
    • https://cdn.sqhk.co/metexemoraga/XdaQMjd/lock_screen_timer_app_android.pdfIn PDF document text
    • http://proba7.xyz/235621164605ui5s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461216/normal_5ff04acb6d1ee.pdfIn PDF document text
    • http://outputqwvk.space/picaporte_para_portonlyk9b.pdfIn PDF document text
    • https://lekinimogasujif.weebly.com/uploads/1/3/0/7/130739945/titusidumotewo-nafamosavojov-kagarebapupebig.pdfIn PDF document text
    • https://bisigategisabuv.weebly.com/uploads/1/3/4/8/134884720/3660883.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/3642310.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/5zgq0ff/38116070126.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/jcp1Ajd/cloth_mask_diy_youtube.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/90fbdd9cf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369503/normal_5fdfa65ac2b18.pdfIn PDF document text
    • http://minosiw.22web.org/wowoluvojuvuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_60107f521b1db.pdfIn PDF document text
    • http://armlur.space/anatomical_position_of_human_bodydtyy7.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/vighdTE/zejobomoji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/bodmas_fractions_worksheets.pdfIn PDF document text
    • http://rijogutigoxek.epizy.com/bts_song_albums.pdfIn PDF document text
    • http://najaxobefirag.epizy.com/multiplication_repeated_addition_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/amelie_comptine_piano_sheet_music.pdfIn PDF document text
    • http://pasazaxara.rf.gd/34581050211.pdfIn PDF document text
    • http://genenapukiral.epizy.com/84606957966.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_off0000e3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E3 5148 bytes
SHA-256: d7ea9b193854def7920e40837dc0e74bcc3b92d555ef07d6e3f164f83819af16
font_01_sfnt_off0000f54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 9796 bytes
SHA-256: 46fd51102edd562613827b187be6f65d760fd3d918e79df2b300a028105c11c9

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