Malicious PDF — malware analysis report

Static analysis result for SHA-256 9548ec7c33ee812e…

MALICIOUS

PDF

77.4 KB Created: 2021-09-04 17:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: af5f1cf0a24af0dd7c1f3993dc48ae87 SHA-1: 2854872a80a05f530ded499a73813980d2b85be6 SHA-256: 9548ec7c33ee812e066686f64c7f5e8fbb5e6a0b6b73eac6ef452307c2c44996
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous URLs hosted on compromised or disposable domains, which is a common tactic for phishing or distributing further malware. The presence of external URI links and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://industrialdevices.in/uploads/peponasazimagub.pdf In PDF document text
    • http://geraldinekilkelly.ie/15685883689.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/96112353846.pdfIn PDF document text
    • http://veitali.com/upload/files/48787703925.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/dmo16033kra6fk7robu5f2q5s4/7006304290.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/50654924028.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/79790352551.pdfIn PDF document text
    • https://airbays.com/userfiles/file/888997589.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/natigasaliv.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121903147126---57183738530.pdfIn PDF document text
    • http://ledins.lv/cms/file/38223281549.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ce8e1e6977b5bd5ae15d5496e838c953/7127698502.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/xowukix.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/e0b17329e6378f47239ec0f8b29664d4/56048821747.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/gepaporusivafotumuj.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d03389dfc8---vizulupojiwolamanoveginer.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/oo5pu2dmbv9rjs0e423ohfnlj7/nevixeras.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/5ea136ec292ac1dbcf5419517de9762e/zepes.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///53525657313.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b1bb1513dd837a68953afcae50556ddb/govazitibamawogoxeraluv.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a04a88e8c76---wunoveripitel.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/38212143963.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/90358499478.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/41840963126.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/gudefevoporije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=radio+flyer+tricycle+pink+manualPDF 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_off0000c9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 10964 bytes
SHA-256: 5086a66d1b6388f3db273188f939c6b1acebc135ad060315c14816e5a73fc914
font_02_sfnt_off0000fb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB70 17104 bytes
SHA-256: e94afdf14447ae49695c469a4e4772ae5165be72180fce25e7dc2d40ab818917

Open this report in the interactive analyzer, or submit your own file for analysis.