Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c235c7e374a961…

MALICIOUS

PDF

83.3 KB Created: 2021-09-09 18:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c33ef13775ccc5361dc418eaeb111779 SHA-1: 86cdddd25ce473f69f67e7419d0f5691e393cc89 SHA-256: 48c235c7e374a961805863ad28709ad515641986f6f8da427dcef1acf9e03e32
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. The heuristic 'SE_CALLBACK_LURE' further suggests a phishing or tech-support scam pretext, likely leveraging the embedded URLs to achieve its goals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pixomot.ru/uplcv?utm_term=tipos+de+raices+pdf PDF link annotation
    • https://fullhousetourism.com/UploadFiles/file/20210909230752155.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/1506430938.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/demabonanexuvepikitu.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/62118724596.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/kovolawedumasigosuzases.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/82767603169.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/69047751661.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16131ad7bd0e7f---52668973748.pdfIn PDF document text
    • https://jobtiara.com/files/files/18984198465.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/xavalepavevumarolomizib.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/ac78fdf0e946875b136fb4a1eaff83a7/60430339656.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c4d46594---94609347511.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/23747730796.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/17793833452.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/57180834674.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/jarumulufawop.pdfIn PDF document text
    • http://moneymaker-gold.de/files/bupebevomaxurufoto.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/59545886438.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/sajepimowadu.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/memuporilirikaseguza.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/34586434063.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/mureriwoviza.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/79605997901.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_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 10328 bytes
SHA-256: bcae9354835565d6b6178831fa97c61ea1b72ea679a33c09061893e3eba4fb7e
font_02_sfnt_off0001101c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101C 18908 bytes
SHA-256: 794bec18d97b33e4d4cf84641ad55b55f5dfc8e556e98bf993ab756bf0870664

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