Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbf63a12ad16d4a…

MALICIOUS

PDF

81.9 KB Created: 2021-07-14 04:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ba3fe6b89caa2428056c5e108c9f1d5e SHA-1: d3ea19e83bfe8e01516f034737494cb30b4e51b5 SHA-256: fcbf63a12ad16d4a41f2dd66277191e1e1bdf96f92ec3a6527b4e84c2ef1a069
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content. The presence of multiple URLs on compromised sites indicates a phishing or redirection scheme designed to lead users to harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/6082f66174159a45a0452c6041ba9401/wagalupigutako.pdf In PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/invhs55ddippvgla4gdaaojj64/xodubasivajumebagaf.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/2p8auf8a5shpuhhtb1cvr10l4j/sogekunetofuwa.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/redimomogegofubudijotedo.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/82a1d69d09f4c1a0e362d01e5e6f82fe/22960887762.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/e1480b0185378fd910b9e70945643297/xunuzurup.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/66086555356.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a06282c2b3---mowarimafaluvu.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/4d7f98f3d8f8ab4ef61ba74e00e61fc6/taperijobodasox.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4505911db---14258468679.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/742684f35d98c8beae6d389f2a3eab79/kodakopoguwula.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/2e75649a109cca0787667e8ffb0e1fbe/77497660630.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/aa57b8c312ecfc521e460aef585818db/kanetimaguguw.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/pisoxozizulisamezoroweji.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/10815034230.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/rowubevako.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d76058eee---59074197123.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080237af3011---fuvefulifavuvewuwadamev.pdfIn PDF document text
    • http://thedreams.cz/files/82835398815.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0092064e9d---pusifaxunofefulopimenuba.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bef73449622---83898720151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=command+for+select+allPDF 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_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 16932 bytes
SHA-256: 387a6b67ce33a4ed98322ab40d9598c2f87e818f2b57d2c354fa0dc24276be07
font_02_sfnt_off000122b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B4 10576 bytes
SHA-256: f70e9db5390988b26e356d442e764f3662d955f6bff25b5c8e89d85df689cd36

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