Malicious PDF — malware analysis report

Static analysis result for SHA-256 0839ed24ada6b7ef…

MALICIOUS

PDF

86.8 KB Created: 2021-06-30 02:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f3ba6269ec3d1a42e98b905678a911cd SHA-1: 3949040a2c4e98e6fdd9236aec4a500f16e31922 SHA-256: 0839ed24ada6b7ef4327b1aa79b9ff06bd1aac043498d8a7013bd4e13b3fb419
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload sites and disposable hosting domains. The embedded URLs, such as 'https://oniceh.ru/uplcv?utm_term=how+to+get+poison+in+minecraft', likely serve as lures to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://oniceh.ru/uplcv?utm_term=how+to+get+poison+in+minecraft PDF link annotation
    • http://edu-family72.ru/content/images/uploads/file/zadadomodinekirus.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/wasuwelalamazexugaravid.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1e08d574---xinuzit.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b14fc462f9b---86838336023.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b496a1a6c09---90967573438.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/semejeneked.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c330d46ca---5397998548.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/fe9k5ljl3v1kpmq73ut8vreuvv/2474062250.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160944aff2492a---dejugalo.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/95568067646.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d7a9c271bc069c835e4937c975cbee87/67093297923.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/81914129650.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/c6dfbb27ddea3956fac47b8a45d4702c/83915366781.pdfIn PDF document text
    • https://neplatnasmlouva.cz/soubory/juraselorevar.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/951e5289a03c760c258537d0d5aaeab3/fedafaxekukotaw.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160bd070246c84---lexaxetotutefarezatinimep.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c9d86ac73b4a5f0fe309282bb5ea01b0/81360259536.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/nj4dpej3p9e3edkfdpkvdbfte2/tabitonojadupopogupe.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/97596011779.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b5263b01c---30007620216.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/dbd5cf54af9d4850ce7c5ef64f4f1cb0/73363539516.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/dutolixurudenipoxa.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_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 10852 bytes
SHA-256: 3385a2a0954a69f88f83d218b9f682563ecb621f07c39471af2a990c0cab704a
font_01_sfnt_off0001092d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001213f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213F 17092 bytes
SHA-256: 32bd1eb09eec4f703a98a24f323d934abb06e04e26ff4e73d7d7b400e2c87031

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