Malicious PDF — malware analysis report

Static analysis result for SHA-256 0109b9fa5bbe23be…

MALICIOUS

PDF

111.9 KB Created: 2021-03-22 02:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0764036ce8db25acb89a21fe45bbf2bf SHA-1: 7fe13381c2a06d5205a42a1f3f05bed52f1df58f SHA-256: 0109b9fa5bbe23bea3f8f3f940732e99f99c3349df19047f33caf2d0e20f5d27
126 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru' which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, suggests a lure related to a 'design agency company profile'. No scripts were extracted, but the presence of many external links and the ML detection indicate a malicious intent, likely to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/award?keyword=design+agency+company+profile+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389571/normal_5ff0d1fddcb7b.pdfIn PDF document text
    • http://nekevofitoruzat.22web.org/67906860964.pdfIn PDF document text
    • http://dazipuv.iblogger.org/bcbs_michigan_claim_appeal_form.pdfIn PDF document text
    • http://lidudopunabiril.22web.org/jadunuzosexarosebaponon.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/xajenapagalirubidogoko.pdfIn PDF document text
    • http://garobunatuxovi.scienceontheweb.net/77252170254.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/94126182884.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410194/normal_5ffc03d196182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368989/normal_5fca4c2d30638.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/76330200317.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nofomojadaku.epizy.com/jawurazuretus.pdfIn PDF document text
    • http://semiwexojexudu.epizy.com/social_media_content_plan_template_excel.pdfIn PDF document text
    • http://komoxam.rf.gd/blank_world_map.pdfIn PDF document text
    • http://zilapiwet.epizy.com/bombas_de_engranajes_internos.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/ca_dmv_form_dl_44.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f674ef5-abb7-4ec6-8fbc-aa5399374e19/maytag_legacy_quiet_series_300_dishwasher_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284f1e88-d1cf-4744-b4d2-6d9421a06817/best_coffee_maker_with_grinder_2020.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/likedelezutip.pdfIn PDF document text
    • http://finuzajobozosom.epizy.com/19777587215.pdfIn PDF document text
    • http://gurevewo.epizy.com/95010385392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372e3bd5-8810-4f97-936d-014577c1e4fb/7591561082.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/80935155066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02305e16-10ab-4e12-9d4d-3790ecd164ca/fozutufapolodaruvuxu.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/gamomufalezokejapuxi.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_off0001778e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1778E 5576 bytes
SHA-256: 08a109cbac6295f82dbe6b9b07ef99d809626820168ff25c9a2be91f55fca7dc
font_01_sfnt_off00018a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A7D 11636 bytes
SHA-256: 88d2e944ab2d2a50eec0412fc70c0e58e10a4290dd1eda2c98599f02a807de59

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