Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48c56c5ff620ba5…

MALICIOUS

PDF

81.4 KB Created: 2021-09-13 11:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d7f109f6d6639e52d98d8d6807916e61 SHA-1: 32e13d57a2369e15c3a359fd61e4bf0f1c74db53 SHA-256: c48c56c5ff620ba5f83c603f3cd25bf35b1af76b2e1f557472005f3e451f922a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress upload directories or disposable hosting. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://archism.ru/uplcv?utm_term=the+kissing+booth+2+full+movie+gomovies PDF link annotation
    • http://vongtaygiay.net/media/ftp/file/fusuketefutipoxaraguxuj.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613171086625e---83537793266.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/97175623645.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/95018402735.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/83617552270.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/detibipadej.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/xonis.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/sakurolezavidikaz.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/sawudizopasavuwinurobomo.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/24561032587.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/7b62cfc313e30d65448a0fc8593b91db/xapigokiluki.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/59616619013.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338acbc0f64---xumudexomugixawirunisizo.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6398982cb---nogemejajorenatiduku.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/gogonovefosutugiruzone.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed913cf5e1---68994489824.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/80148476550.pdfIn PDF document text
    • http://krupongs.com/images/file/vurobelexuraposaba.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/74689464504.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-4/20210904221335743664.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/sululopuvabuwen.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/wotorinuvafizipogezo.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/51fd4d7f2c54a36bdd2a012dc785a907/14344240108.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/73368428717.pdfIn PDF document text
    • http://aven.su/userfiles/file/xamab.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/xuxazud.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a57a56f1e---48687140317.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_off0000cfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DB 10880 bytes
SHA-256: 70264534ebee2dcf267e6ba68619c7e3176588af72be5712ba806f2c7eabe63d
font_02_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 20236 bytes
SHA-256: e468e08f8e1e94d39d7010148455ed301ea786a94541b4d2d61089ff92c21fd3