Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54257c8661831c5…

MALICIOUS

PDF

95.0 KB Created: 2021-09-08 00:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4437cfdcd36dc2b3a6baa4220c81da7b SHA-1: 98c67295370748baabc5bd3bf2439c66afb67431 SHA-256: e54257c8661831c5aca209a684b6e1611f9a0288e3e7fd832967f050b27a84be
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 or download further payloads. The heuristics indicate a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to obscure the true malicious destination. The ML classifier and ClamAV detection strongly support a malicious classification, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=microscope+%C3%A9lectronique+%C3%A0+balayage+principe+pdf PDF link annotation
    • http://dogninja.com/userfiles/files/97362989983.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ncld2q2bd5mjbigrubrk9djc6k/91807767226.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/80437021055.pdfIn PDF document text
    • https://tadimtursu.com/image/files/7718603005.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/444a1c631b6a9e32067e7c744785a7da/murujoz.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/ginutuwoduwu.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/626a43a2f65065e2769b6b41da78ef0d/luxumogijogafinikexip.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b55d70854c---rinulo.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/84210025028.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/71840305816.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c298cd1ac0---38898629271.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/7460289008.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/68766558229.pdfIn PDF document text
    • https://renetravel.ro/images/files/derojero.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/fi5ltjlnsslkm5autjaj5ujl19/bewuri.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077468adc093---60373033165.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/gunibajobi.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202108260046297970.pdfIn PDF document text
    • https://landi-bg.com/images/file/nubobomizipag.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/86965459926.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c49fa50649e---tukememavibetusil.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210731_031643.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5180644c6---rugaku.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/femarubafurizelaxugurut.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5756caac01---guvujabexepaxixipi.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_off00010498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 11624 bytes
SHA-256: aa4d8e6b838dcc2a4cf055f88fc23115206853635cc32fe33553a3ccb91d2651
font_01_sfnt_off00011ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13704 21136 bytes
SHA-256: ceef9845d5f81551711bdb0548fc241a57760d9376c88d4d042a75393880df30

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