Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b80bbc258b1e92…

MALICIOUS

PDF

75.6 KB Created: 2021-06-13 07:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3686d37d0312503bde0895e638fbf037 SHA-1: 24a284bd0ceb07d33d6fe25a8fe499c9cf3be00b SHA-256: 32b80bbc258b1e929894343ca404998720f07b6d3e0685f4e6e3ddbde49e0f2b
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'Acca manual j load calculation', likely a lure to disguise the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://chcial.ru/uplcv?utm_term=acca+manual+j+load+calculation PDF link annotation
    • https://aravlicraft.com/cmsCart//upload/file/21854063407.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/wavexokabapipirimelusoj.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d474b5f26---zotuvukavi.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/da49l433b61kko8tan29rgvb84/ronemabodusovitenepi.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file/%5C/18044914846.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/wotedujavugonivekutumati.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/favowajajokapudowemarepo.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/25624185217.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/lobim.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/0jtjm3oiqt05aufod6da6dmdf5/ditef.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/80755308932.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/0hc5mhl37muagsd08ebp3nsfab/suzalove.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/godotifobuxex.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160794ac79c50e---derotepoxapogesa.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079e9a202458---45906898138.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/30515212922.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_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 4876 bytes
SHA-256: 8d79f609a263456b74b30e2c80c7f75625c77d70a71d36c80d4817205b62bb79
font_01_sfnt_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 11196 bytes
SHA-256: c3f65ea46881b85763324ec770894e5524cadd4325d008b395f360f5b1c24e01

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