Malicious PDF — malware analysis report

Static analysis result for SHA-256 9282a1caf4ecc0bc…

MALICIOUS

PDF

74.8 KB Created: 2021-09-19 07:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 759b509759466c0425a36d572d3fbe29 SHA-1: 5501df4b6d414a815cda7ad929328286fa6cd840 SHA-256: 9282a1caf4ecc0bc0c0bce36e4069c46a5756626669306910e9fe4f273fcced5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and IP address literals further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://insightonafrica.in/userfiles/file/55328584986.pdf In PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/buxegob.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/36436934751.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/7682494797.pdfIn PDF document text
    • http://espokebar.com/uploads/files/norobiturilem.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614030fe35f66---vabavudugukudofitezosezi.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/86310246969.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/38356298946.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/zowuj.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/bunukarim.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/161354535ae7ae---382196049.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210905_7228A1C227CEECDA.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ep385t252isgoru7ul027bhor7/41280590823.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/wafeperokalelukuduvekide.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/68ffb1332adfad4c5961071298d106bf/5421159431.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/8f6c4c4522eee8393db12c975ca3f8c4/73114328939.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/galodarig.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e60e02c033---67839505139.pdfIn PDF document text
    • https://adikkedua.com/contents/files/fetaxikodomujagutifewox.pdfIn PDF document text
    • https://sergiomauri.com/images/file/girotazodoxuwikefepunude.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/47970749472.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/seronopusijixu.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/webubuwi.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16140ea45b5ce3---61285665369.pdfPDF link annotation
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+open+phone+pattern+lockPDF link annotation
    • 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_off0000c258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC258 16832 bytes
SHA-256: 5fb83eb8e3f1ce376e5e28b62f8d65ec987dc552571489c5e86aee51eefdcc31
font_01_sfnt_off0000edc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E0 10380 bytes
SHA-256: 638108f43555fd33123ec9c2ef8d2318d90aa2dc391a41ef20fc7255969090ca