Malicious PDF — malware analysis report

Static analysis result for SHA-256 a534224a18fe872b…

MALICIOUS

PDF

77.9 KB Created: 2021-03-13 19:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6365297258555a0b984c1939b6c0f73b SHA-1: ee3f78271fd87d4d1953c4ac7662f610a1fcf43d SHA-256: a534224a18fe872b61f277fa2ec71ecc86889e89c7eb73a9acd7ce0c525846f4
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'mezovuduw.ru', which is likely the malicious landing page. The document body, though heavily obfuscated, appears to be a lure related to 'bullet journal future log pdf' to encourage clicks on the malicious link.

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://mezovuduw.ru/award?keyword=bullet+journal+future+log+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383687/normal_6009a60618f5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501360/normal_601500b81cad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_60109b03c412f.pdfIn PDF document text
    • http://xajuguzim.iblogger.org/be_with_you_2018_eng_subtitle.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/16959702035.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ff7fe2-d5ae-4848-8aff-3526408bc4c4/10053184465.pdfIn PDF document text
    • http://kejufomamikis.epizy.com/13563323092.pdfIn PDF document text
    • http://pikididubemet.epizy.com/vumefeke.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/wetilivefibojasura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3aff87-5a5c-4f89-8c36-c91067a630d6/what_is_a_dvr_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/055c5267-775d-46f2-b178-62190585cb98/flowers_for_algernon_summary_progress_report_1-10.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/xodiz.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/saxumivo.pdfIn PDF document text
    • http://kunijudodo.rf.gd/54036247604.pdfIn PDF document text
    • http://kudovumajumiw.rf.gd/11226373513.pdfIn PDF document text
    • http://kudadurazeze.rf.gd/thin_foam_sheets_walmart.pdfIn PDF document text
    • http://wegexaluda.epizy.com/can_you_connect_2_bluetooth_headphones_to_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc010a58-9716-4672-82d0-12609b12f811/72236800373.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_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 5156 bytes
SHA-256: baba03ffaffb7f9a39587a821c1b14474da1e06e8eec9ad508471baaefe0b40a
font_01_sfnt_off00010424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10424 10848 bytes
SHA-256: 3390db047255758074d74b78f6804b1cbca0133002b84e91cb95a2ac05fa771e

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