Malicious PDF — malware analysis report

Static analysis result for SHA-256 017fa28e625ec12a…

MALICIOUS

PDF

95.3 KB Created: 2021-07-18 19:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 2f3aadbde48c2764cfe7cb300678f51f SHA-1: 33916d918dd94dcd092b3cbbf5c63d776f183ba0 SHA-256: 017fa28e625ec12a2aed56000ce31f42f4814cc1d7034dc8b38ecbd25163754c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into downloading further malicious content, likely through a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://naturabliskociebie.pl/userfiles/file/16316180387.pdf In PDF document text
    • http://altelaw.com/uploads/image/file/sizigugunarevisapozigu.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/10015018161.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4an50op7fhl8i40afsfjpl8p5a/63072573965.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/vawepavijanodivuwife.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/nudironolaxezujoketilagad.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/74085019367.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/12630194501.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b47cd1e4248---63022143704.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/53132618806.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090c5540e43b---72451709203.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/mifoxeso.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b14ee409---fuvejozagerijamonul.pdfIn PDF document text
    • http://coumert.com/images/file/71898394945.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/lugezajuperakabufelu.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160820b3b5ff67---daneguwapilexonagiz.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/nuvotizasonuvitekej.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210620_64B87EF76ADC8A73.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf1ea37391---39053423582.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/xusuxixobidizifedex.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706b84c6b0b---71968680720.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/96460276074.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/denakusijodag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=lacie+network+space+2+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 10888 bytes
SHA-256: 9210b9c03946859bc649d847e89cd88385a50e8a660f65a3a2cc7c9bb6310d59
font_02_sfnt_off000127b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 16144 bytes
SHA-256: 319c1d6b5a9dfe45ef2c311a2d5ba00a192ff2e3c7a2103ac7a27dba584f9d59
font_03_sfnt_off00013d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D22 19516 bytes
SHA-256: a634f33617c104a73526f8f5460cde193ccb25c7f7cf50a663883a96e64811b7

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