Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2bd0372be1df3d…

MALICIOUS

PDF

71.5 KB Created: 2021-10-08 11:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 20f85b33044c2034de7035c7356e6d3e SHA-1: 34e7fdb27126f9507fd6c5ee1fc7473f72c8614e SHA-256: 8c2bd0372be1df3d4447ed5f5dbc2a9f4f768d2e5ed70cf1f536451d6627ace4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://smidgel.ru/uplcv?utm_term=worksheet+on+collective+nouns+with+answers PDF link annotation
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/81191760920.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/tibemesatoj.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/dazikurovotolarixetizexek.pdfIn PDF document text
    • https://vietcuongcorp.com/uploads/news/files/53865204614.pdfIn PDF document text
    • http://rcsiprojectracker.com/userfiles/files/48976497371.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/9286594583.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/pekuvuti.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/698d43669a34e4d28a5d8ebbe411e669/88592465000.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/76449294225.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/61223811482.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/govozazelajedajigegaxujet.pdfIn PDF document text
    • http://z500.si/files/dumuvejudav.pdfIn PDF document text
    • http://hainfelderteich.at/kopivegulowimidobivuwu.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/jerufexewazi.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16144cc7a82d86---43892391571.pdfIn PDF document text
    • https://anbc31.iscriptscloud.com/app/webroot/files/file/xetomumanida.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210906164839_9cp9v8.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615fa3cbbb064---fefesajovopiwutad.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/67818901938.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b05623469b---lojanukeg.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/noxunapoviwotavabejoxira.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/94895564410.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_off0000b442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB442 17136 bytes
SHA-256: 1ccbccff65a3d23df208b0b6a631f8ae9eb6c78e9dea8e97c97923c43b41265e
font_01_sfnt_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 10664 bytes
SHA-256: e013603c6b3dbd3baad70195ddbf42f245a3e21ccb1bf4852bcc8bc0c1a062b6

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