Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8b087fd2cd9b5d…

MALICIOUS

PDF

81.7 KB Created: 2021-09-19 15:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2d9c0bb1fb0ed22adfb0f4377ca1b9a9 SHA-1: e6d35ab6d2a33ead5e72183f021d8e36d36318fa SHA-256: be8b087fd2cd9b5d8791ff5f352aa3284d904a87c627207a867a6fe03bc313e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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://philabc.ru/uplcv?utm_term=redmi+9+prime+is+good+for+gaming PDF link annotation
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143022dc1a75---pupikirejozutovare.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613913477e405---joxapedigajizebanufono.pdfIn PDF document text
    • http://cncsprings.com/d/files/welenezowexusirediluridi.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/83738576500.pdfIn PDF document text
    • http://areopag-group.ru/sites/default/files/uploads/kuvezakarisepiwebufu.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/kolizabexasivov.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/14284495953.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/givepuvekusidowunawire.pdfIn PDF document text
    • http://blgjad.com/upload/files/32981032303.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/87542409813.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/vakitawelutaketunenoke.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/vawow.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/sejeligozogusanekezu.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/3582007574.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/69827226574.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/33588013632.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/towusenuvakumi.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/30253309413.pdfIn PDF document text
    • http://zerosquareonline.com/file/nezononusisukojizakizega.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613341ed79c9d---sijugafosulasimesokujafa.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d3bd9d20c---23364025919.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/pulovajosapu.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/wibinomiv.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/62251798126.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/32599804139.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_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 17620 bytes
SHA-256: 9767b32e380254e2489c490c791583847fc07e9d77a32aca88e8a210e1cbbde5
font_02_sfnt_off00012014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 10912 bytes
SHA-256: a31b2e5e735f67e85de8287eca558e4a6009f65c6cd24249d68b8a2c2f86f735

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