Malicious PDF — malware analysis report

Static analysis result for SHA-256 adba297d92c7035b…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 14:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 02c9d195a22e0f57c8ad1e16e2a76604 SHA-1: d65ddd87112636c1d28a9fdcb12fb2999631e842 SHA-256: adba297d92c7035bafd5480603d1713bb838085e551dcbf011718fe2d49a99a8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'personality adjectives pdf worksheets'. No scripts were extracted from this sample, but the presence of external URIs and the overall heuristic profile strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/award?keyword=personality+adjectives+pdf+worksheets PDF link annotation
    • https://cdn.sqhk.co/zonigita/jxgjUca/77228145543.pdfIn PDF document text
    • https://cdn.sqhk.co/selusujava/jgdamtP/79110828226.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/canon_pixma_mp240_ink_absorber_reset.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_604a0b16b4209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486350/normal_601e1419bdf3f.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/iVWicSW/rujifawefujewedimig.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/jijik2m/benowedekawejuwiben.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/NKdicgi/the_highest_pass_in_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenelavup/gQ3sgGv/acceder_a_mon_compte_icloud_sur_android.pdfIn PDF document text
    • http://vafotaxikijofol.iblogger.org/anglican_protestant_reformation.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/how_to_use_your_cricut_explore_air_2.pdfIn PDF document text
    • https://cdn.sqhk.co/gazegarov/gfyLggV/22005032809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417138/normal_6036a0d79928d.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/kepazatulokexaraw.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/08856159-63e8-43c9-9cdb-eeaf46995438/15927780401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5aab8b1-5d10-4a2e-ab29-82824820a01c/acido_fosforoso_formulacion_quimica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca14dfd-6a4e-40c1-9a01-4a36fe5703b6/kubota_t1760_service_manual.pdfIn PDF document text
    • http://gidozapufemogig.epizy.com/71503890930.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 5640 bytes
SHA-256: 86263da8bb8d85d8ba20e3067046e2e50a6d0277cffb29752f5b6dd651f7b265
font_01_sfnt_off0000fbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 9944 bytes
SHA-256: 75839d227789f984952322c31743e7f4977026bcfca7dddd4c540906fb04b533
font_02_sfnt_off00011e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E34 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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