Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6eed803e6ea1a5…

MALICIOUS

PDF

100.4 KB Created: 2021-06-21 07:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 60302e18a426a9f646e49cfc574e4153 SHA-1: 8bcd1d3b65547d108a7b040db5bf57b9e05b7aa3 SHA-256: bf6eed803e6ea1a50f0b41e18021bb047d8c085b72297aaf031412c674733a8e
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown URLs indicate a deliberate effort to host malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0988de181fbef9e7ffca1e320813d5b0/21735887484.pdf In PDF document text
    • http://hanhthien.net/uploads/file/buxutegaje.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d7ef99c535f89ddf35c7730115dfedf0/zadiga.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/2tji3g2g5kietai7brbvpc6m12/92174306581.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608be9710c504---nezijazonevogowo.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/epvbpu78ouaichpejjo4f7oii5/fomururivukimodusafutewi.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/31515721093.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c596a594c9e---rokesalepubusanuj.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/negaxel.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/98119009929.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607250db501b9---32375973829.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf261e8c94---24050821073.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16082ecc25796b---32711211919.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc8543cc4c---vubusixurike.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/kemilukesameki.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/fq9i6j159sgls77jarad4fah80/31042523742.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/bdef7878c370d582120dc3a29d2ec97f/58931603636.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a3bcb0562---70549295723.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd9cd9c10d---89230963989.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=pojav+launcher+java+edition+downloadPDF 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 6464 bytes
SHA-256: 25c9ff06bb9d009c90caf61ef827b72e26ee3751fe40f8a05a887cba5d95576e
font_01_sfnt_off000104f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F5 2984 bytes
SHA-256: 8fe6f6a9ea479ab5f731baca4a07c8cf20a204ac971b47ef048a416670439246
font_02_sfnt_off00010f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 5076 bytes
SHA-256: c8a46c82f8a13a52c3b14fb879a3cbda8fd841a0798559b8c357943b7996bcfe
font_03_sfnt_off000120a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A4 6224 bytes
SHA-256: 75d884876c26c9635b3d7e0bd28a43f8e429153b9b8cbe768eba889a70f45f23
font_04_sfnt_off00012fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC1 13368 bytes
SHA-256: 7b3a302ff6c57447e31e88028c2588b1742d1d228f37b54af2741f6ac68dc5ea
font_05_sfnt_off00015ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AD3 16612 bytes
SHA-256: 5ee502e6c8357f82591c14dfae29d14e5839a8a0db207cd6639ef00fd17347c5
font_06_sfnt_off000171ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171AE 6120 bytes
SHA-256: ef83e843aca274ff3985b8c8b4ec136f575ce5f8cb59f856a6791f3867888917

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