Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc9d754014f1d21…

MALICIOUS

PDF

74.4 KB Created: 2021-06-14 21:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7ab0f1e87a29d01fa0868c4174a1f78f SHA-1: 81a46f34443d2891c6e52801e02e42902be212a2 SHA-256: 2bc9d754014f1d21bc525e6e5a3469a9ebd3a8f3ef69dee51a6665b6323337d7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits multiple heuristic firings indicating it is a link farm. The document contains numerous embedded URLs pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links strongly indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://chcial.ru/uplcv?utm_term=snaptube+for+laptop+download PDF link annotation
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/petafuruzu.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/5bd047d9b71c3c8505902d70bbf89715/74249848984.pdfIn PDF document text
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/28372362236.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/bc122fmo93pt3q6035nh6jt0f1/vezotemikasobaboribakuge.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/vitijoruvudadaxop.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bdba5d15efe---77462870837.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/92307705704.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/caaefb1c84b268479b2cac1ea8e4c786/26898970107.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa46432f54---73050859895.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/4pcdabvtagqpa59i2s46oo3o22/tapeba.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/5ikfl0vbmni2ofsf74cdqcm001/51489959955.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1a13bec0e---9588485447.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af99da058e---36525169148.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/potafopimixasebaso.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/7678034685.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/064fb63e09e08f2a81c29123e6831597/73472253528.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/zuginisaparilajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 5192 bytes
SHA-256: 1d6d726347477184b4e29e1b70c0776f00cd82fd56b94803696fb6122a1e75bc
font_01_sfnt_off0000f874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF874 10552 bytes
SHA-256: 3305f1e4d1eb1cd6b546df427cabd88c399eb9f3a46b4e0fa79d306262cd0fb0

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