Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c7471064306301…

MALICIOUS

PDF

89.7 KB Created: 2021-07-23 05:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 03ee296b8bb1cf14db9248ef825e3bf2 SHA-1: 574630bc928075939dabe98ec4bef9e45177b18c SHA-256: 60c7471064306301caa1e4088e15d3b73f2b0bb2331d46442584aafe585a9dde
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary function appears to be redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://ibtaker.ps/userfiles/file/89526236601.pdf In PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/35579309905.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/nefuxefosupejovejavudip.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/be9200a90980bb0e1ada11a535c59d96/sazigakukojo.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baeb998e5a2---bagizanimegubajuru.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/zipob.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/21605796468.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/xozupalalivulenifu.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/dareduzifuwonetumitikumi.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/19901194575.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c43be12fbf2---lavijenumipugoz.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e56e16714---69765317132.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd13412b10---varukovagotatex.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160b29bf1a41ae---ravixok.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/58f5a876aa373931352b2a5ef5781d28/38817861787.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/dujinapufiwuta.pdfIn PDF document text
    • https://loctra.net/userfiles/file/kanav.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15748e94d4---27476447292.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e7cd40008---vizafaxezi.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/tolafixabodalat.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/40586338255.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738572d04a0---86967979021.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/534a03db30f61f4531f5113e8e66c2d0/kebopeforuxaverujonoxepa.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/43d1a6725cca55213ab07e7383b5d1e6/51800483053.pdfIn PDF document text
    • https://kultmotor.hu/images/files/nesifabimabukoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=difficulty+in+swallowing+is+called+dysphagitisPDF 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_off0000f96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96C 17380 bytes
SHA-256: a1a325e7bc90e66aecc212b281fd821a9f459d1e9737e66a443d9d32000caea4
font_01_sfnt_off0001267c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E93 11100 bytes
SHA-256: ef6f1d5531cd366cdeb6c99b4ef9f0c7df2ae764ce398c0270609a3991b3fedc

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