Malicious PDF — malware analysis report

Static analysis result for SHA-256 6328f21385e41907…

MALICIOUS

PDF

67.9 KB Created: 2021-09-29 09:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c762f8c481bd8f0d83ca64153221c3dd SHA-1: daeadf11465716ce5cc8557d078f380de6f8044a SHA-256: 6328f21385e41907b81705948f80011362d5ee5be6434c4e25fbfe524bc92f1d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The heuristic PDF_IMAGE_LURE indicates a common tactic where a screenshot is used to hide malicious actions. Multiple URLs are present, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or redirect users to phishing sites. ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://totspotdaynursery.co.uk/ckfinder/userfiles/files/zegufewir.pdf In PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319540864c1---tawatuxaloxexezivube.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/kirilibefatupilota.pdfIn PDF document text
    • https://pedrazzini-legal.ch/UserFiles/File/74745623118.pdfIn PDF document text
    • http://tianfonmm.com/d/files/kizab.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/tuxabevagesikimefusaleniw.pdfIn PDF document text
    • http://orlickachata.cz/files/files/fatowufizir.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9cd451621---rusufekebedafaw.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/temowodevanavofuxaza.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/logupizaduxovisuwagamupi.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613476d9a698b---90122816380.pdfIn PDF document text
    • http://camonetinternational.com/files/file/rosazifigosakamaka.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/varal.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/93756794793.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/9043311840.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gexirutasusedebada.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/39354532731.pdfIn PDF document text
    • http://kelt.pl/userfiles/file/dawaxogepejenizalekago.pdfIn PDF document text
    • http://samarthservice.com/userfiles/file/kevafunivodanaworafatak.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/58846699893.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/miwejavufom.pdfIn PDF document text
    • https://war-old.its.vn/new/userfiles/file/4947129453.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614597738f5c7---wabipijaguwupoviwezupupu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=free+fire+games+online+download+apkPDF 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_off0000ae06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE06 10900 bytes
SHA-256: 1c9ea27168fbfaf4d2ceaef506cce4eddaa70872740317c2c6d245812894290d
font_01_sfnt_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 14000 bytes
SHA-256: 131d3359ceab85dc34660b7b5b2d3995e0c5d0a0d4bb296a0fb9b2dd1e183cfc
font_02_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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