Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fee090208c4b9f…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 02:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 597a04dac769ef710a5adfbd7fceb567 SHA-1: 335c57c4f245144759ab427bd699f6d5e64aa941 SHA-256: d1fee090208c4b9fae0a31dceed54d4accd68fbd6d3e37ede4267635211d7189
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to external PDFs hosted on compromised CMS platforms and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing campaign aiming to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://drivescuolaguida.it/userfiles/files/dezarewasizasiribuwi.pdf In PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/90941805275.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/29112834366.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/95477573492.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/gji3g2vma461ga6afrnh6s8tnd/35997026967.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612c55bc2bd3f---54283894093.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/luwineme.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16094b405e729f---38877065712.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/19akhiq7fh97e235v8l6mcbglh/tatinevimi.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/30621518529.pdfIn PDF document text
    • http://capital96.com/userfiles/file/25630355802.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/fiwasajejawebolaxi.pdfIn PDF document text
    • http://juha.be/_files/file/vazojoboluzawusubofos.pdfIn PDF document text
    • http://turnyras.lt/Files/file/26581067935.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ee4a676dd---bawekofom.pdfPDF link annotation
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86f8b3ab72---94389357949.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/rodewele.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae11a71f22---dodolakagonudapajikezik.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/wekiwutomurem.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/8198a12056b687f2fca36198347707b5/xaletupawotazarilelo.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/tawexetiniv.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/iaghk7u2ggfuticj191t5r6a92/mumevunurow.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/10995897554.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=rent+receipt+format+pdf+for+income+tax+purposePDF 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_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 10984 bytes
SHA-256: 3603a531b8de896dbc9838dfd43c62e0fe7299f4d1cced6cc9c9743578b4f7d5
font_01_sfnt_off0000fcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAE 18292 bytes
SHA-256: ea1e1ce1fad5922fce67eb126572dbbea0ffcfcb3484bdcf6b9c3bb7585094b2
font_02_sfnt_off00012c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1