Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a85ef10f301713…

MALICIOUS

PDF

88.6 KB Created: 2021-07-06 19:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 85f1f2d4c69fece12a259195978ff4d1 SHA-1: b7da8afeee0a12bba4f4aa20327b2ade925d21ba SHA-256: 06a85ef10f3017137dd4056d5e394f1e094ad953955406ac8808d290b61dc8c5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm or SEO poisoning tactic to redirect users to malicious sites. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://autoscuolepintozzi.it/userfiles/files/powejitafemijej.pdf In PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/94796462255.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/59771948557.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/natunab.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d336193ad1d---26102463321.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d47d906d2f---lojomifefodines.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/75010741284.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/97731681981.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/78338890227.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa8decf096---puxudafuze.pdfIn PDF document text
    • http://areaarchitetti.com/userfiles/files/63359941063.pdfIn PDF document text
    • https://topplene.com/upload/ckfinder_temp/files/20210627005337.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090c6598ae05---40640406304.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/3qflc1s8rnrin1dipopus8bbdm/dabukodafagudetokekot.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be670735a4b---3915134053.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/ca424ce14779e50805b743cdc2a1a264/14408668624.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073cdef4f272---joxutidepifimaniv.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/6b74e0d01d3bec2a7041c6cca3bbc37d/79866245630.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/matonodarafojumujise.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/nemibixa.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/wamemisutefarojelufuwejis.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/63777852672.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/r7nje2nbslspug3p275hsgjjt7/pogevupapekuwejotigomi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=calculate+the+hydrogen+ion+concentration+in+a+solution+having+a+ph+of+4.60PDF 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_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FA 11644 bytes
SHA-256: 05574aeb4c0400a48df9e0d3c5d25c14293f5513e2d0e894bd009f896b24645a
font_02_sfnt_off00012384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12384 18476 bytes
SHA-256: bb347a49857b97da4f79962174328a5d57b9ff155dc47d273c3a807bd665b352