Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d00228802bfc3af…

MALICIOUS

PDF

88.6 KB Created: 2021-07-16 05:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 68fcacf80ec2cfc1470a5901a4b73f1a SHA-1: ea4a230fb917e76250c66641990ba36d639b43d4 SHA-256: 0d00228802bfc3afda077f7fa5265c614045e8da03336a0b05410bd91f102be7
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous unknown domains, with one URL pointing to a compromised CMS upload. The document's structure and the presence of multiple links suggest an attempt to distribute malicious content or engage in phishing, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://homeopathyhongkong.cn/files/19618627740.pdf In PDF document text
    • http://sicilalluminio.it/userfiles/files/99413697976.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/40311524643.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/82017955888.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f30484ed4d---mumirolofewimawosabikewif.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c25b04287a---27907748423.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/gokafupopukadudadu.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/19314299613.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/pajagopewaf.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ef04e6484---gokolutevivafig.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/99132321588.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/29306643392.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160806b7b2145d---nozavexigekerolemasef.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/jabomotedoved.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/kieo0ffl6ess9sgtdk5p2e1omh/57740002529.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c3713861b---74966998858.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/woberezuxozudiwoji.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/fizatelomamomamedubagifi.pdfIn PDF document text
    • https://bushregenerators.info/userfiles/files/25496427301.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/fetanodukulukojiriluvug.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/kunavetevubuzawuxux.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee298822299---dejaboleti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=constitutional+law+exam+answersPDF 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://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_off0000f7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDA 10588 bytes
SHA-256: 2a609a67bfdd19a98326fc57a1acfa4114fc3a51d1be76517e06db33adccb2fd
font_02_sfnt_off00012827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12827 17208 bytes
SHA-256: 951c6d81f305fa4d2cd26f519c8e104badbf86e0115189d3e7dbe27b9a20f9d9