Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c9068cff7ec624…

MALICIOUS

PDF

79.5 KB Created: 2021-09-18 10:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 10d675d328fcb56e875dc7224f163865 SHA-1: 6fa957c993410bdd27421d852775ee1fa036168d SHA-256: 60c9068cff7ec624ac501082c20a32ac930c6776dfcd92628e7e70c6dc812cda
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised or disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm nature are common for delivering malicious payloads or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://chcial.ru/uplcv?utm_term=i+may+destroy+you+123movies PDF link annotation
    • http://stillincontact.com/images/mails/file/sifib.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/99453163191.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/sajobowurowobojol.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/98820833488.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/161346e958c6c7---57145155342.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/lixidofulumu.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/xujoluwelazipix.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/loziresubujek.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/49608092692.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/vewanumifijesamumelupo.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16135113ae32ae---jesinaxoteta.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/97360023346.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/wofibowekif.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/4620854461.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/58437055434.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/44743354317.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/vofovisuzabuzurotoz.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/ladilebogowow.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/65106208427.pdfIn PDF document text
    • http://reylab.com/userfiles/file/56482677201.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/40711903985.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376eedd0add---72132333568.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/mujosotidurudagakil.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/3708631693.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/079226271a09df978382632bd4846c1e/januw.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/25270361754.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_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 17368 bytes
SHA-256: e773bca9d0af0471ae7c7d1a829b55c4dcf1493207f38c9b56809831c439c17c
font_01_sfnt_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 10836 bytes
SHA-256: 4ed254fec659158c621c2216f2466d5cc7f5d3ea77da86f0858d9a9ac74a4117
font_02_sfnt_off000118ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1