Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bad709ef0bd33a6…

MALICIOUS

PDF

68.3 KB Created: 2021-02-23 00:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b6bc0d3acc29963153f67341323ec5d2 SHA-1: 7a5d13484d7e90a50dd553764b784c028a0d7f44 SHA-256: 7bad709ef0bd33a672dcea849ee6b5a7db4293decc62f423dcca35e1bb4b74dc
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF structure are consistent with techniques used to redirect users to malicious sites.

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://jottigo.ru/aws?utm_term=what+does+e9+mean+on+hisense+dehumidifier PDF link annotation
    • https://cdn.sqhk.co/lizubenesowi/CFij2bK/32815403653.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/S5n2gis/wifova.pdfIn PDF document text
    • https://gadofipod.weebly.com/uploads/1/3/6/0/136056298/radiribebe.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/velaras_gidevazegovuje.pdfIn PDF document text
    • http://prosale.company/gojorijepinutomimibegutavml6mm.pdfIn PDF document text
    • http://smotrikino.fun/gijopizuzaknl6w.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/pofejaki-volis.pdfIn PDF document text
    • http://fitokapss.xyz/miwezuxoxexiwasngmjn.pdfIn PDF document text
    • http://detonic-ro.website/77556093923lh9to.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/vuterijoze/45957003433.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/12098162388.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/90995442452.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/nokomuvigijevewezuzorak.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/sojojifapenevox.pdfIn PDF document text
    • http://daxarugusawo.epizy.com/piriformis_muscle_pain_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/sujadusunomunotet.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/re_zero_light_novel_volume_10_synopsis.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_off0000cd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD35 5284 bytes
SHA-256: c9c6be1e6060ca72a65857b815307477407cc274d870e1baabf5087007392878
font_01_sfnt_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 10316 bytes
SHA-256: 96a2c018524bea4a9ebd2e56839654b5b26a1a1c24f3777ffda7af9c2d0dabd5

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