Malicious PDF — malware analysis report

Static analysis result for SHA-256 beef25b31d1e6300…

MALICIOUS

PDF

81.7 KB Created: 2021-09-18 04:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fdac2104e903dac05853fdba5ae874b0 SHA-1: 30103cf81960bc4ca4aa0bc20b7b47b39106e5e5 SHA-256: beef25b31d1e630085d233106e66e28822a812d4820075c49c8e1b6ad8ede24d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm. The URLs likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=how+to+compile+an+apk PDF link annotation
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fokavogixifedufetowog.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/82290487128.pdfIn PDF document text
    • https://trongtrucsolution.com/uploads/files/bapowinajun.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/49234566269.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/4295174725.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/f5b4010ca40b6673307d47c5f77c78ee/povepa.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/xewoxeguzonajo.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/7241ae1aa1a455cd3489a73caf912e15/kugapagofijonokesiratanoj.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/zararuzusepoji.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/jerakulifajemaruriwosu.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/71718153281.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/vowomove.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161425d867e2e6---31807171012.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee1b74288b---24623420788.pdfIn PDF document text
    • https://codecs.ro/images/file/70854954597.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/lunexarexelor.pdfIn PDF document text
    • http://tabletopad.com/images/file/78089383604.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vawunejarikodez.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/27151242114.pdfIn PDF document text
    • http://roberthalasz.eu/uploads/file/29759495790.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/naxineduzofoxojanejolekil.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/powapivejalebum.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/lotuboro.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/rotexiwalolu.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/romakovu.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_off0000da89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA89 17696 bytes
SHA-256: 770d41d7ec9e8adcabbac5dd834e43184e5755a560a261c13c591b366c31a333
font_01_sfnt_off00010916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001212d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212D 10436 bytes
SHA-256: bbd0e0d132497052a98daf40294f8278a7239cf0c9e2b7e9f40324ef0e6adc52