Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ac068e270daa6c…

MALICIOUS

PDF

89.5 KB Created: 2021-09-12 04:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5a3438f3858a1f91591dcd8c2d150f69 SHA-1: 9a955a52391885b1dc104a252cddad0025291b20 SHA-256: d0ac068e270daa6c5f782cea907670d9f3c10430b7819ff95df07fa66c86ddc2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically noted as a 'link farm on disposable hosting' and another using a 'utm_term' parameter, suggesting a phishing or malware distribution lure. The PDF structure and embedded content are consistent with attempts to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ketchas.ru/uplcv?utm_term=geometry+dash+apk+full+unlocked PDF link annotation
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613666fad0f00---fafovedinulezixowagesej.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/suwunelumevawe.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/9017889998.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/22854442011.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/68576508395.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/95004715947.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/25806275026.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/62915419977.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/sizolinefa.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/megomupilo.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/wupexuvovife.pdfIn PDF document text
    • http://travellerisland.com/files/nevelajoveniwegom.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/20156706653.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/25728412615.pdfIn PDF document text
    • http://szm.hu/userfiles/file/25177769705.pdfIn PDF document text
    • http://agavietnam.com/img/files/tozisijusazofufu.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/wudozusupamejete.pdfIn PDF document text
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210904025459.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/33521886074.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/tovefonikigukedud.pdfIn PDF document text
    • https://rajakedua.com/contents/files/jojinegisujasemuse.pdfIn PDF document text
    • https://xtremefitksa.com/ckfinder/userfiles/files/99331213293.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/jogexiramujedabelelu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110ED 11140 bytes
SHA-256: 967c66ca7c3adb9aa644ca76a879070a90a824ea5dae05216078d00d71ddc1fa
font_02_sfnt_off00012ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD7 17516 bytes
SHA-256: db128f892fe45982e7d4ea1f78c54a8a60f543537e8e855fbeee337f350b1afc

Open this report in the interactive analyzer, or submit your own file for analysis.