Malicious PDF — malware analysis report

Static analysis result for SHA-256 015607c0a8220bce…

MALICIOUS

PDF

69.4 KB Created: 2021-09-21 00:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d313462e53e0bba639ecea84782cb5c6 SHA-1: 0d20c17f005475c6bf50f8ac228292e41cdb68fd SHA-256: 015607c0a8220bce0f57f53a7d5631076c7a25e31094e83d17892970b0f429e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to various domains, many of which appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://smidgel.ru/uplcv?utm_term=gta+vc+game+download+for+android PDF link annotation
    • https://europartner2.pl/uploads/losojo.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/judutowagakufop.pdfIn PDF document text
    • http://ud2-140.com/files/20826634643.pdfIn PDF document text
    • https://novsport.com/content/File/45723517742.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/fawunogawe.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161312d1bdbe28---xomemuzuxoz.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/vamozelag.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/vogaka.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/gafajaf.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/38220288492.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210903052034.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210904/files/20210904040725.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/93430600757.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613adc4907ff3---23185071004.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109040851141587.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/8144137643.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/losekiwositapun.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/82000269594.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/97988426307.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_off0000b118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB118 10844 bytes
SHA-256: a3e7fa4ddb77a0b14db517918ce4674ce54c11fdc74afed980bf7d7ec903ebe8
font_01_sfnt_off0000c9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 15224 bytes
SHA-256: d0c45403888a3baead94bf1493dd93712e2b8d4b04b3c846e7c8941ee8a65393
font_02_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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