Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8248d00cc4c89d8…

MALICIOUS

PDF

87.0 KB Created: 2021-08-08 09:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1e29c2c0f7757f7d384a237008efa4ce SHA-1: 9960504fc1451981b253bca7c46bc9f3743d51e9 SHA-256: f8248d00cc4c89d8da68f35ece42fc741865886768d97208afec26ebf8307711
156 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 a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • 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://oniceh.ru/uplcv?utm_term=used+husqvarna+dirt+bike+parts PDF link annotation
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c4066328e---luxulularisizapewuz.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9fd3e2599---56842200272.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/1527616760.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/fujifetagijotowalikum.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608468fad7421---81432289502.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/xiwisutek.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/wupisupuwug.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/wukipanu.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/4b880c9fbbb0602345910edee941fe1a/68557316724.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/84437663428.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/felixukafokidebepopa.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/nuseponerin.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/hnsdcm1t2fh3psmm0ig077f9t0/wexilidofupoxub.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/mexoledivodogasigokopuwo.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0651dddcb2---suturuv.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/werumurabix.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/51948969500.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/paditizujebedunikameto.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/49933332337.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/71a2af8b21a5799a2eec583193bc6648/69686666854.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/80195802142.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_off0000f12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 10876 bytes
SHA-256: 64d9c70a6efc3255e911c20f173e21f1841ffbe121396dbcb94ff9a97dd4d428
font_01_sfnt_off000109d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D2 16720 bytes
SHA-256: 300a1320a6d2261c6b6849b26ac48e91d28bd2a11535c6f601f01cf0f56ffd2e
font_02_sfnt_off00013539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13539 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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