Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5701134a3cf5e1c…

MALICIOUS

PDF

85.0 KB Created: 2021-09-18 00:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a0690cabc6f8996a5ed067f4d3500b60 SHA-1: e43c05e22768bb9fcca41689d7b4733032a73264 SHA-256: c5701134a3cf5e1c38f110efae72b2968cf7b8c9b29c3acfc8fb9170b8919afd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous domains, several of which are hosted on compromised CMS platforms or appear to be disposable. ClamAV and ML classifiers flagged this PDF as malicious, specifically identifying it as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://rejs2013.cycling-recycling.eu/imgturysta/files/xatikaduxiwutekavox.pdf In PDF document text
    • http://synthecinter.com/userfiles/files/10442406560.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/topifidogududur.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/nelejuxawuxurova.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/215f13f48a54de9b733802734d9ae27b/nujezugam.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/gazumo.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/82974840745.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/92577515396.pdfIn PDF document text
    • http://magiepourenfants.com/images/mediamanager/file/84693174965.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/35c29e793c513ae90d46bf09b74446cc/43399399494.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/kedonib.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/27209378668.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/topewapizawinime.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/9mjm436u0pns6hbcuekvnlkchd/49921484684.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/43919663458.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/98237657917.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/lokekelaturetorovapolina.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/pizipaj.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/82739063601.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/70626759465.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee0bcb4739---mekux.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/60168367033.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/vuxaketiwabireb.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dce9a8064b---25592055822.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/wuxaxegetof.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/xekosubezole.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=update+alexa+app+on+androidPDF 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_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 18188 bytes
SHA-256: 0297e268f05a46b4bee9933a8b91361b6ffc846b332441d60acd8220e6e56dc7
font_02_sfnt_off00012f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3A 10328 bytes
SHA-256: 182e8d831a4a669bc2ffebcd8ef419be8f1ae6a06bdf594d43b50cf2a08b75ea

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