Malicious PDF — malware analysis report

Static analysis result for SHA-256 deae4b571d8e0b5b…

MALICIOUS

PDF

79.1 KB Created: 2021-09-06 23:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b57f723095d80a6a97d76ddb1ea2fd3d SHA-1: 660c9697b65ddc47b83fce3a4315a45439832cd4 SHA-256: deae4b571d8e0b5b807501e4751bf628c9f7ed4ca1a0ec7c542ac82c3a1ca340
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, indicating a likely phishing or malware distribution scheme. The file's purpose appears to be redirecting users to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9005

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://chcial.ru/uplcv?utm_term=tooth+morphology+pdf+download PDF link annotation
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/65237309148.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/32754858117.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/89268fd00549ecdb1524af35a14a0cd8/xilelomegomomap.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/97274691539.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/dotaxo.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/27255970197.pdfIn PDF document text
    • https://osakadentalcare.com/contents/files/20095630926.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd122c6362---xusivosifewojizevapeneti.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e8fe99139096356da337f1f03ed418dd/bupukesenezegixaxutifi.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/5116152953.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160db8139e01e1---54759840782.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/tikekevikirukuzigaguro.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/53923891739.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/69c5e60ea6d1a27f5a54d73a56bee42d/55977501044.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ed811502b---xezumakixelutonufadabisex.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/36171039289.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/41248699444.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/kraqnt9ut7d6qjmbmk9hu17qd6/46042112803.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/91341113820.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/bewame.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/galunabepojewigagan.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/jenoluxunibo.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/35ed52d5da751cfccc9c2cf6acfc155d/wavobasepoxiv.pdfIn 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_off0000cb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB67 10716 bytes
SHA-256: 1c0f6a85e536278728d4dd5d4870b3b207848529ef6d2c0ebbe62eb3be7309a6
font_01_sfnt_off0000e3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 18488 bytes
SHA-256: 2576b63494a3ac90a27f917e55aaaa16391d24f8cf6ad99a91bfd4fa1032c836
font_02_sfnt_off00010101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10101 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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