Malicious PDF — malware analysis report

Static analysis result for SHA-256 9297b31127c69569…

MALICIOUS

PDF

75.4 KB Created: 2021-01-17 11:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 64370e4cb8a55fa6111e50578768642d SHA-1: e7424462e60c0e723a747558f42652d51061beb3 SHA-256: 9297b31127c6956976fa7477645acfa38207a7cede2de62c3c03f7325f58fef2
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one specifically identified as a malicious redirector. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=boonie+bears+theme+song In PDF document text
    • https://site-1178369.mozfiles.com/files/1178369/57587848422.pdfIn PDF document text
    • https://site-1235182.mozfiles.com/files/1235182/cheetah_mp4_video.pdfIn PDF document text
    • https://site-1203466.mozfiles.com/files/1203466/86510971934.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/wififawezatuga.pdfIn PDF document text
    • https://jokiputukalak.weebly.com/uploads/1/3/1/1/131164130/tadizuvarit_banogudezipixe.pdfIn PDF document text
    • https://xusudunegowubub.weebly.com/uploads/1/3/0/7/130739081/8178222.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/7672419.pdfIn PDF document text
    • https://site-1172173.mozfiles.com/files/1172173/best_buy_jobs_cleveland_ohio.pdfIn PDF document text
    • https://fenorave.weebly.com/uploads/1/3/4/6/134639489/1794382.pdfIn PDF document text
    • https://diminulagiv.weebly.com/uploads/1/3/4/4/134489960/vukoniweded_tirawepameva_wuwularajotam_mowafinabubo.pdfIn PDF document text
    • http://netekigupi.22web.org/partituras_canciones_infantiles_gratis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruxopagotar.epizy.com/fingerprint_attendance_management_system.pdfIn PDF document text
    • http://vokulokunupada.epizy.com/77165739201.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/85570327887.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/54153328514.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/balupu_video_songs_._com.pdfIn PDF document text
    • http://vipaviveza.epizy.com/88757960892.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/shogun_2_guide_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/meio_ambiente_e_sustentabilidade_livro.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_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 5256 bytes
SHA-256: 0b2f5dc0d28ca5a8ccb13f1436f02fdaaa38509b7f1f9fa8cf10b3dba7249f93
font_01_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 10932 bytes
SHA-256: 155a544d3aeb4d343ce6529271ea7581324a21c9ba03174274afebb28f5e86f2

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