Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46a24bf67c41470…

MALICIOUS

PDF

87.5 KB Created: 2021-09-04 18:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b371c79724bb74f07a65b844c05baebd SHA-1: 3200cab19d2adaa839f7eab878854d5ed70026de SHA-256: f46a24bf67c41470565a485a4e9a0a55434ef788051f761920ee14c33b1fdaeb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to disguise malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • 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 https://inwebjor.ru/uplcv?utm_term=calendrier+ligue+2+mobilis+2018+pdf PDF link annotation
    • https://clubsportedinburgh.org/userfiles/files/98339351772.pdfIn PDF document text
    • https://stormester.no/files/file/37808003769.pdfIn PDF document text
    • http://18554080.com/userfiles/file/dapikunev.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nokozuxopomojikeregud.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/10515222263.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e68a7c8fe49---vorunafepi.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a2548f261---95395000805.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/82108639924.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/81826697723.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e91d58a8c0---61845837045.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/59856589708.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073b551a9dc0---wunuruserutew.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/96587320881.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/6svfk3muk61886n7aobp5uf0g9/13578612185.pdfIn PDF document text
    • https://shopabrang.com/images/files/30661332291.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/rivosekidonomiwa.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/pubamaduvaxikinebale.pdfIn PDF document text
    • https://rosycaffe.com/file/67810223602.pdfIn PDF document text
    • http://pnalog.ru/images/file/23126513541.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8c4edaad8---palawoneviwope.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bb5bf38af---7869908895.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d04b092ef3---petivujiperesegugewipix.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/91838284839.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/26340438880.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_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 20292 bytes
SHA-256: b0c1312976cf36132e1a00c755a3017011f5632a48d14409de8397e9007b4039
font_01_sfnt_off00011b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B1 11516 bytes
SHA-256: c25d36bdeb24e2cb8d7c6befde40f2f2cfca003e717a24c23a77650896f4c019

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