Malicious PDF — malware analysis report

Static analysis result for SHA-256 e130b45dff747e06…

MALICIOUS

PDF

71.6 KB Created: 2021-09-11 14:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6cf84a10cd01f6285ff4307fb01b33bf SHA-1: 4e955affcb5ad2edfdc33708fad00f180ad71e57 SHA-256: e130b45dff747e0647b5b169daa897a57b109607041621b4fd87a81af580a71f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://motty-etai-sharon.com/files/files/sobezewemugiseba.pdf In PDF document text
    • http://irk-yoga.ru/upload/files/dudatufanalivasuzi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613944bf72e0e---xolulovunijiledewuju.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/93630640449.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130197d94da7---bitadujugo.pdfIn PDF document text
    • http://change4best.ru/upload/file/35497707007.pdfIn PDF document text
    • http://exosushi.com/uploads/files/judebosasusomoxe.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161318742e46f7---muluvuvadojifezujupafi.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/selaworezijisekajudilotax.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/kafutuxiwakizazebapido.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/49544211001.pdfIn PDF document text
    • http://nemochem.cn/upload/files/50686735862.pdfIn PDF document text
    • http://krallarintavugu.com/upload/file/nuserewafimeledovi.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/1784915365.pdfIn PDF document text
    • http://www.heksan.com.pl/file/voridufaritaminukiba.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/65176658175.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/kamaxumidiga.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/lixilaf.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/dotegoj.pdfIn PDF document text
    • http://bwc.lt/i/97391303415.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/73066237701.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/18312997195.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/71286726772.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/lonesuvapibojufipele.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134764c14f5d---gilojulumibumidojarapep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=new+haryanvi+songs+haryanavi+2020+mp3+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
    • 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_off0000b60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60F 11400 bytes
SHA-256: 8cab40be16cb912678da149af1a6a0985981d14a1e28332a2106249788945a05
font_01_sfnt_off0000d0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 15556 bytes
SHA-256: 4399125988f4b7b1587fb91e38f0fc22ee9ea111b7ea5ddb7872b16f3358ce49
font_02_sfnt_off0000f89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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