Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5f3ccaf00de76e…

MALICIOUS

PDF

69.5 KB Created: 2021-03-27 22:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9332494fababc0e84cbfd87dbf42cf69 SHA-1: 23525c2f7c4dffc24e22880b7efffbebe75ad275 SHA-256: 2f5f3ccaf00de76e68d7e6a645616964463aafc7d6ef71fcfb0a17656c759ad8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution scheme, likely leveraging embedded JavaScript for exploitation.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=quadratic+simultaneous+equations+ppt+tes PDF link annotation
    • http://rijunoje.mygamesonline.org/7404070619.pdfIn PDF document text
    • https://roxomikanu.weebly.com/uploads/1/3/0/8/130873860/diwepako-kikilalogogon-gaxejifokar-tikulunitaf.pdfIn PDF document text
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/47ab9.pdfIn PDF document text
    • http://noruxonek.22web.org/aaoifi_accounting_standards.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/alain_badiou_eloge_de_l_amour.pdfIn PDF document text
    • https://dapiridefurewej.weebly.com/uploads/1/3/5/9/135987432/6658757.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/aed22be05.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/fodose/sas_ods_landscape_fit_to_page.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/rituzufoka.pdfIn PDF document text
    • http://lojetewope.epizy.com/video_capture_apk.pdfIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_8e87eca003b741feb4d56ceb06864653.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_aa144644f6424f168052e7fa2388bc57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/sipujegobinubizipegetoj.pdfIn PDF document text
    • http://tituroxir.rf.gd/94569828206.pdfIn PDF document text
    • http://poborunedajemo.onlinewebshop.net/495083015.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/ark_bronto_platform_saddle_gfi.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/hanford_site_environmental_report.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_bc27eb84c49749d49b49e879c9adfd6a.pdf?index=trueIn PDF document text
    • http://xotopusedewix.myartsonline.com/63558818917.pdfIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_e5f699c1de0f4451b36d1fd1adc8197f.pdf?index=trueIn 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_off0000d1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DB 5404 bytes
SHA-256: f9ed05fb22f2b4a593848846bac8d40c4954b6144afa065e1dfa10567ffebe57
font_01_sfnt_off0000e420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 10696 bytes
SHA-256: 9c5cb9bed62e89c64fbb354b287bf5ebf71f4d5e778254c97a689eed46f347e3

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