Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02589e9bef77941…

MALICIOUS

PDF

72.7 KB Created: 2021-02-18 23:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8d84447e70841e1d02cc9c3118fd3faf SHA-1: 8b050facdfc92e892c454dcd03dafefe4ac2bfc4 SHA-256: d02589e9bef779411cf221abe4b4baed305dab929911fdddde777ae8ae0dd92b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/aws?utm_term=cuisinart+convection+bread+maker+white+bread+recipe PDF link annotation
    • http://vobugefu.22web.org/12355591478.pdfIn PDF document text
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/6982143.pdfIn PDF document text
    • http://tedalaz.66ghz.com/mirror_site_to_cygwin.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/OhcqifG/xodorexuvetebesixanadobaf.pdfIn PDF document text
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/764c1e733.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/Hjciejd/nedefo.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/gJicgcJ/54342205634.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/351b23e757d45f.pdfIn PDF document text
    • https://gukofatupov.weebly.com/uploads/1/3/1/0/131070505/zosubusumi.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/xwjjbhh/vufokasow.pdfIn PDF document text
    • https://bevarari.weebly.com/uploads/1/3/0/7/130740456/tuburewukisak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pexefenebize.epizy.com/27306917219.pdfIn PDF document text
    • http://mafofeguf.epizy.com/19837280215.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/knowing_god_study_guide_section_one.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/xilipakimuzepupolojip.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/beverage_air_warranty_guidelines.pdfIn PDF document text
    • http://mizadebep.rf.gd/realidades_1_capitulo_1b_answers_page_22.pdfIn PDF document text
    • http://bopefurolo.rf.gd/xaguz.pdfIn PDF document text
    • http://jekidosokun.epizy.com/change_bottom_navigation_icon_color_android.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/89502027833.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_off0000dd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 5540 bytes
SHA-256: 70edfce9e61646333eab7bf487f4c6f684dada8a245382081ecdc52a629bb740
font_01_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 10924 bytes
SHA-256: c13980baf6b0cb50e112f6509a0f545a60f04fa8db799ccfa54fe7c31dd86a21

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