Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffe154ccfe60f37…

MALICIOUS

PDF

91.3 KB Created: 2021-06-25 17:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 23c2467615030b4156c65a82c2746120 SHA-1: 9d7bc143376db1c794c7d74fef5cfb3dbac69d96 SHA-256: 8ffe154ccfe60f37ba99069e4e6c36cd2eb99944b7f7163f504b4503fc49e971
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URIs, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URIs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=define+control+risk+in+auditing PDF link annotation
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f078c4ff32---46190457121.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/17f8422c44427664b79813d06f72b87a/8050715582.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b311d539532---gamiziw.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/6e0c0e4e8757b32af8d504117f8957a5/34870472312.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcb2c88f29---gumijunodusinonuxom.pdfIn PDF document text
    • http://medica-brno.com/files/84343493886.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/44946944736.pdfIn PDF document text
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/47584498196.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c040e73dc07---dezinuratolovixojomiza.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/vigekitefolafez.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e8e45950d---zalomaweputafivupejusix.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd1e814fdf---xikapusajigize.pdfIn PDF document text
    • https://ivanamihic.com//files/wogunu.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/enf7sgk5c9o4863tjtlv013t7p/lozipu.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/jamemazuletex.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/pitaduvesi.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/31581743181.pdfIn PDF document text
    • https://daismene.it/file/66576469335.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9adf92e382---98833168201.pdfPDF link annotation
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/474c17a78fd68e72b674e4a8c726ba4b/temiperubarujune.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/23e02b06a62c5bd2730c51601084c23f/13315869870.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09e12e5b06---43564051786.pdfIn PDF document text
    • http://groupkaishan.com/d/files/54850175553.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/kogukamefonixifid.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/d39f6acca3fe8f5f8b9f564ac999a4a0/xegoxikowujosufewap.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c9ca8e3c8---6256491385.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/86057654373.pdfIn 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://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_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 17100 bytes
SHA-256: c957e40dd8467a5c4e4cf9f601881470ee93588f081224d5448331b7816450c7
font_01_sfnt_off00012ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BF 10844 bytes
SHA-256: da90fb52ba22a8525eab600a74d6fcb9f9bb37726657e204caeae8700d4436c3

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