Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ebd12016fc53b4…

MALICIOUS

PDF

104.7 KB Created: 2021-07-30 21:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1da699225904cc5972c369ea49b99f64 SHA-1: 162dccb4bb61aa49e91698afa0937f09c5f0e8cf SHA-256: f7ebd12016fc53b4a204e50b2079e674be985ceff69a7f87ca59dcab8380bfef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=how+to+get+dragon+steel+in+rlcraft PDF link annotation
    • http://orlickachata.cz/files/files/lefavigap.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/t08e1lbtvqdmjse1q6i97k4hp9/diwijiv.pdfIn PDF document text
    • http://iccarrentals.com/files/file/fuxedizegawuto.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/xukezol.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/82886800164.pdfIn PDF document text
    • https://menu2uplus.com/images/file/ruzaxevar.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/gjkfu55q4dta5gj4udc00qubk0/24983840215.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202106111456571770.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0848154ec---puxora.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de8dbb4be6---neluzaziduwe.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/tovipodenakokenakanot.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/faxumebivowe.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/56071731775.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/jipimaponujojuwutemixivaz.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/e4ae439bdd2115e33ff4954f5b1af960/gasugew.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/30892126304.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/o0qekrn1bnrpbtdg3aiddt9bmr/92872578023.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8f488b9dccd54326a24e2ecbc9f1af0c/vekiwub.pdfIn PDF document text
    • http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/50023367070.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf98334b286---ropozusik.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/34074193434.pdfIn PDF document text
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/92024006848.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78e03cc63c---49908822977.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_off00013636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13636 17008 bytes
SHA-256: 71f8e65fd9cafe6f68c21738a9992b93b2a7cfd30d5792a986b919e3ec38c536
font_01_sfnt_off00016263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16263 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A7A 10728 bytes
SHA-256: 7ef0922fdd46917c9566a7f05fbb83e44494a842d92b33f104e952a4b6dc0ede

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