Malicious PDF — malware analysis report

Static analysis result for SHA-256 4281de6f66454abd…

MALICIOUS

PDF

77.3 KB Created: 2021-02-15 05:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 46aa2feeb66204d763f89110c80027df SHA-1: a4acff54a3fb984ef11b1bf084e399263cba3a31 SHA-256: 4281de6f66454abdf47f4e4a82b6301c39a6f888b4116833b3c39184fe211e29
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with potentially malicious content, disguised as a wallpaper download. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/aws?utm_term=wallpaper++3d+love PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5ffb5a4007784.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501360/normal_5fecef8f74d6b.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/gShjpgg/skyscrapercity_forum_pencakar_langit_malaysia.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/gz4hjgf/56014350158.pdfIn PDF document text
    • https://vadukoku.weebly.com/uploads/1/3/4/7/134707593/3303f17.pdfIn PDF document text
    • http://vanlit.ru/boston_celtics_2018_schedule8765d.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/ehfii4b/rectangular_cube_surface_area_formula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452206/normal_5fde2da65380f.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/9038938.pdfIn PDF document text
    • http://topshops.website/financial_reporting_act_bangladesh0r5vw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416150/normal_60084d6b5882d.pdfIn PDF document text
    • http://garirixis.22web.org/mtabolisme_des_proteines_cours.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/3SjfQii/photomath_plus_free_corona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kodurubakasifi.epizy.com/free_web_design_contract_template.pdfIn PDF document text
    • http://museduzapotu.epizy.com/algebra_2_solving_equations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/46952527622.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/88771718604.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/78138294447.pdfIn PDF document text
    • http://nibewisule.epizy.com/36331932083.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_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 5012 bytes
SHA-256: ccbb40f37840de86a6440f050501b9892406b1cffd7f35f7fda81479ee588e7e
font_01_sfnt_off000103f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 10648 bytes
SHA-256: e86d8e04d3dceb63aeb9b302c3c384b75744fb5ca082281c4665fa839c289b58

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