Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1d096076ecd1c7…

MALICIOUS

PDF

92.0 KB Created: 2021-07-03 07:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d6b8feeb2f13572af442437b60657f7b SHA-1: 073c2c4bc5b062787cb6ee84fa23a86a1ca6d148 SHA-256: ba1d096076ecd1c79a5b60742429a797f0d5520c438bd8502d23bd501833ce60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://garglob.ru/uplcv?utm_term=sample+request+letter+for+office+equipment PDF link annotation
    • http://fotografiafrancescosomma.com/userfiles/files/lasum.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/25699828564.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/59635341532.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cbf484144---92572970919.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b06a98491e7---jajava.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/pu15ggqn705t12lit0o2rjorl2/xofurokuf.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/37299198308.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160798464a9628---97337482819.pdfIn PDF document text
    • http://airsoft1.ro/files/file/jewakebupuf.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d3bd4b7c---ziwalumerebixede.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06ed683ed7---nitotoniteneroxinurixezu.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/avm2llmu05af0tafj0ad4ntven/wekosidolepugafuxo.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c66478f148---56644506811.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/9943608326.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/dolekeboritamuzaje.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/92466077638.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/kidijokizuxifunatesudinox.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc483f04e2---nitofodejagiwudokosik.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/pivatiwogepikopi.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/nitunaga.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/61512956058.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/ab33bcc63fa73d546f9c6651e1af768b/48132032339.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a5a18177---wetolisuv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10207 10964 bytes
SHA-256: e7c86ad910d3e15558a1fe02d34df29325ebe3944353a5da8af5d8b0f26bce95
font_02_sfnt_off00011b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B63 16080 bytes
SHA-256: c9fa871d706934500ba7362bcc2679cd089fe7f1d29a584b92b55675ed6be739
font_03_sfnt_off00013087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13087 19384 bytes
SHA-256: 2f8df6d7fed1a6aecf83df2a3c03be2d2418294b682fa9bf921188cebb5ef0fd

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