Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea7556e91f1da7f…

MALICIOUS

PDF

84.9 KB Created: 2021-09-09 10:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f56e18b3ca59f310ec805263f0babbb3 SHA-1: f2bd6e5f61e9ac7c74591db89e13abd61e0244c5 SHA-256: 9ea7556e91f1da7fed22d3688d46ef9e428594890511110c92a3b710c8467491
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://brilsports.ro/userfiles/file///pabusagugawoto.pdf In PDF document text
    • http://thesciencenetwork.org/uploads/files/75523102083.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132407c3f866---xafagowigabejiluzunef.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/vaviwijokugo.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/fijufo.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/8c1ba870ddfd944c9c370cf658863650/bawudutinabe.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/detexu.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/91179215576.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/21704854131.pdfIn PDF document text
    • https://luatkhangthai.vn/upload/fck/file/wegolosozenun.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/pifogurisi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2cc450302---tilirikaxusorixugomibiz.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/tapigivijedodeti.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/12388443549.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/gevijegelom.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c19fc8808---jivetazigejigurov.pdfIn PDF document text
    • http://maksimetall.ru/files/jokesezodamudisinibale.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/jovavasujabimevimuzepo.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/lumusixowojeforepevinero.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/57705596437.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/74744674797.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/14645004188.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/63467049849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=dream+league+soccer+2019+hack+iosPDF 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_off0000e168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 19228 bytes
SHA-256: 1fa2b00f0f9cf76803f570b364afdf16bdcc3cd64605dc14fd7884c6c3270053
font_01_sfnt_off0001138e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138E 11132 bytes
SHA-256: 699c853f8967edb0e06f915b5b34db2be113cb5a9207ed6885412e7555150830
font_02_sfnt_off00012da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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