Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2cb9b9f30b2a33…

MALICIOUS

PDF

86.1 KB Created: 2021-09-03 05:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 88e1469ca6f06300798cadd7bdbc6935 SHA-1: 8752a58f2533286472fa222573a93a06bfb3cab3 SHA-256: 4e2cb9b9f30b2a3334ec56ba131b5f41b0f4c4f261292f99d9c81c510f472e75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ketchas.ru/uplcv?utm_term=spatial+data+science+pdf PDF link annotation
    • http://muzycznescyzoryki.pl/userfiles/file/95954336395.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/wuguwavu.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/oo06o3fdo4sdnibsdees06u96t/89316681038.pdfIn PDF document text
    • https://semut73.com/contents/files/zedogenoxozexone.pdfIn PDF document text
    • http://mlead.net/images/e/file/jedumeva.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/tovigotovinizoloma.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0136b3e027---73700015566.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f9bf265ae---65825525464.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/juwazanopazol.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/70906807.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/movepetutimuravo.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078006cd533d---99392872987.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075334ad5bea---sigujum.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/lamutumemosalunimiwo.pdfIn PDF document text
    • https://topupdana.com/contents//files/13421494924.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/gufefubofokimataxo.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607c58d171515---53655111229.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/ribitejadorasefes.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/nitekumamimana.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/19324699889.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/595c1cd81f9919c415578d3757387ab6/90998806766.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/47042586534.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/08f1e7e9af84eb1744ab1bdc535e6fc7/lagef.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc7e503bb8---68555628151.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/pobilodufemenoguzavo.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_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 10468 bytes
SHA-256: e177d996bc4cf84a54d36f30cbc29f8b643f64e7abcde2d0c311d8680b1a3d26
font_01_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 18204 bytes
SHA-256: 0df57750fd4d0b49b6ac2c553751457137879aa372bc80965bcf380ff56e3a13
font_02_sfnt_off000132fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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