Malicious PDF — malware analysis report

Static analysis result for SHA-256 7598c072f295243c…

MALICIOUS

PDF

73.4 KB Created: 2021-09-06 23:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80ee10fe45ed41bda23ca0e73ce3164c SHA-1: 70b8df9af299ea74d754a8ff8f28ea3ccd2f795d SHA-256: 7598c072f295243ce27db8722bd97e0ca11d2d9758ee2f7d6e0c8dae76e9b50d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded URLs strongly suggest it's used as a lure for phishing or to download further payloads.

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://wastran.ru/uplcv?utm_term=tracing+worksheet+maker+free PDF link annotation
    • http://alphasigmaoverseas.com/userfiles/file/31397793450.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/63697060134.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53f17a6b2---84097984697.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/2217e48fa539012ca3535babdcb1196b/562565740.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/giwuvovamemexifewupanot.pdfIn PDF document text
    • https://termoformat.md/img/files/59563148037.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/libuku.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/9610214117.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f48704da1---kepot.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/54821444766.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202108182125126163.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/1j54kmeqfbhulg51radcvmnk16/42203839419.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca06f5d7a5f---54159652458.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5cffa5772---2805546102.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079302ad0aa4---19990576972.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/nevepexariluzokija.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daef7fba4c5---11275444476.pdfIn PDF document text
    • http://www.77ice.com/upload/files/rurarelepokolapuzidivusi.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/35646049812.pdfIn PDF document text
    • http://cserepakcio.hu/xdata/file/25977474177.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5224b4da569dbda99cbbe025e9ae6c7/rubogamudipodozawimatam.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/627887939c04629d8995dbb79c137280/55463086809.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///80498414444.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/zupovi.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/6efd6e5c47c83a1ea748cadd564c4f35/zupekoxodatupigujuloxo.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_off0000bd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD03 16304 bytes
SHA-256: 76d7e12bd9d5b45fa6ea1a66095e40c67f2db95d781e60e224ac7a4ced2b4338
font_01_sfnt_off0000e6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B3 10880 bytes
SHA-256: 7ff9018869f6110a65360c8aaed90b70921a98421ff16b4d2ffa40eb9382abce
font_02_sfnt_off0000ffcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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