Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddecb57567698197…

MALICIOUS

PDF

68.3 KB Created: 2021-09-24 14:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5b58cce5d410ae780e42f44ab4c177f8 SHA-1: a027406168c5478bb5758192403246a318efb4d9 SHA-256: ddecb5756769819766279b39aaf98386c73c703753c699dbca418b3a905d44c7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=mx+player+live+sony+tv PDF link annotation
    • http://bijverhoeven.nl/uploads/files/kebuxawesa.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/9174490438.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/15615571796.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/bukolijexigu.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/22632573141.pdfIn PDF document text
    • https://digireg.sk/upload/xonebe.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/wibuxizedasaw.pdfIn PDF document text
    • http://gibisch.info/files/files/tabubixunavujivunadeser.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/81673973347.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/29946547757.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/5d144590ca06f561a746ea1d9d6ea42e/11314328613.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614b35f88a23f---9388276561.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/vikesaxapoxife.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210919230018_hblb0a.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/jojivad.pdfIn PDF document text
    • http://iucecb.com/files/file/daramozafug.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/nujopojuz.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/manekisejesix.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/61043322047.pdfIn PDF document text
    • https://alev.az/userfiles/file/zobivizupafupuwitutisar.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/pateguzibepiwobizaza.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/suxekeninuxevamew.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/sevidomigokur.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_off0000ad5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5F 10520 bytes
SHA-256: 72a6f9526d74b0f2469e0495e0a34675149c552318fa90a3dd5e3d0035600c43
font_01_sfnt_off0000c587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC587 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 15320 bytes
SHA-256: 3568391c8c92b6a46e52d06072ecc614308681e22056d0e9671ee00af4692a00

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