Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ea3b40f0edc59b…

MALICIOUS

PDF

87.2 KB Created: 2021-09-21 19:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 388f9338d0e64655e381d1477fb79893 SHA-1: 5b4ca2920ac7286d33e7801d31a7722b553eee72 SHA-256: 29ea3b40f0edc59b85a6b361d605797a79aecdd81c7db2d31b70dd6e7cc9c299
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing embedded JavaScript and a significant number of external URIs. Several heuristics indicate that these URIs form a link farm, with many pointing to compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded JavaScript may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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://queure.ru/uplcv?utm_term=demon+slayer+mugen PDF link annotation
    • http://www.pics4us.de/userfiles/file/xajavikoketaxixiwubur.pdfIn PDF document text
    • http://vejwun.cz/images/rododojejawusutezoxa.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/xupujafudiwemewu.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/76853913924.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/xiropuvezajusotupuw.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/gerukurewode.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bee955034---81212792950.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/kikufoxef.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/volubimed.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/57681861589.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/26a173c76a3b72a424bcda7f443e8a09/zonan.pdfIn PDF document text
    • http://sergeisurzhin.ru/ckfinder/userfiles/files/52310430734.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/pimotajuxebofobikog.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/lorotun.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/piwenubavuwa.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16148024c95034---49844489748.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/baxitotugokitobe.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/42494865846.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/robumefesevolitodo.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/17569078356.pdfIn PDF document text
    • https://onlinendttraining.net/files/jumivuromelufub.pdfIn PDF document text
    • https://majubesar.org/contents/files/nepuwijow.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/30298773262.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_off0000e459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE459 10476 bytes
SHA-256: c5ed99c0c04398ef496a6f847409653b8cb7cc175cbde65370389f5852afe0ee
font_01_sfnt_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 22596 bytes
SHA-256: f9d68eafc1fc8b289cb5ef6f60ac9159c898c36a514be91f496fafb032f2d2bc
font_02_sfnt_off0001374c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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