Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e6b92c1fb0e348…

MALICIOUS

PDF

83.4 KB Created: 2021-09-04 15:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a67d32fca0b8cd19e2700febfffb63d6 SHA-1: ba78612204d09f6891b8e8a1db96e06387ac6189 SHA-256: 97e6b92c1fb0e348804e11a1b0815838b2f1a29ef2502b8e65ff50935f8ca45e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bda4df053---rajes.pdf In PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/7892727b17fbe21e29120c97049d1279/1655515302.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/24875418192.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/83963bd62dbe1a5f55642d60ff0a78ff/vasivuvodiled.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/tonunijamivemaz.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/junusovizakuvo.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/85014231257.pdfIn PDF document text
    • https://kawanmto.net/contents/files/jagorarujuxik.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/9017053972.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/surebedejefagaguzomut.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607868f06497b---12072229454.pdfIn PDF document text
    • http://mopron.ru/upload/files/69980187359.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/58202945321.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ca9a2c7adc---mimomiwonenabojanul.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160730aeb64fd4---99623704790.pdfIn PDF document text
    • http://spiregene.com/image/files/20210701_122531.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/17721578818.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/d943050b19089f61906b65b430b7d871/25218089341.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/08buq3ovo17em4qg4hifeu7dt1/gimekafenixonoxatojab.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/9cabc18be1d6c98b54183ddcedb90acf/49305664685.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/6f3652f365f13214cd9f2a31319fa39b/xowatiguvivatuduxaj.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/23675193227.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/xodaz.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/jananugapukoteseju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=physics+book+pdf+for+competitive+examsPDF 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_off0000de81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE81 11248 bytes
SHA-256: 9d366d5b9cc2f37033caf5748d805906ef3bb600be814859833528217e7c5d2d
font_01_sfnt_off0000f8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D7 18032 bytes
SHA-256: d58f4d4902b14463620382a9fc0a00f3e9ec1f109ba23ab0579079768c4c52f1

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