Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d314bf24c08e06…

MALICIOUS

PDF

73.4 KB Created: 2021-06-23 03:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 475b27c3d9bd9c363bdbada7f164763a SHA-1: e94c70a032bf6cf3df27a02268ce1cff050a1d77 SHA-256: b2d314bf24c08e06cbcfb46f9f22b722765b163e48bfef07819962ec307d7883
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document has been flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a link farm pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the overall structure indicate a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/bilas.pdf In PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b203e4cf565---mekitibejemasegosekita.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210507113215.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7eb5ae8c65ac5bad11fd525ede2e10f3/13319617368.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cce5b421412---13747122788.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/dafakolovamutenonet.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/3mi3642cncf471009f0hb4m65h/25360331105.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/tojunugev.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b07413d3e6---vunosek.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/37517883993.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/warovepebakodabepun.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d925f1331e64bd82b144b888adc29bd4/rodoparulilurixefajexa.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/4cca437ecf0f13f33d27b62dc9f1b582/moveluvof.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/191fe99caf739fe2ee4f6fa372b98c7b/mevova.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/g9li3uq929ufac1rlodo11fvvu/56666185540.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/4bd6c0ef9e1ecb782fe3c08c513f40f8/vugesojitaxijigatavawuf.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/lujozemo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b778babfa3f---xaxavisimewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=bt+notification+smartwatch+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0D 5428 bytes
SHA-256: ccdb473ad096ca451e877552700f4fa2295bc9d073eb40b06addd4c3744f7672
font_01_sfnt_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 13300 bytes
SHA-256: 6eb63a73a4a3786f2face2769ba7d50a67451c1bbb43a516a9b23eba0525cf29

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