Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1c95e27bc3e129…

MALICIOUS

PDF

76.4 KB Created: 2021-07-12 22:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8de38d86fad15a6621e9508f34ff3721 SHA-1: f085bb16b8b9e7240e2e7acb77f689291a179958 SHA-256: 7e1c95e27bc3e12934e9514dc9e1be6740e6e4ce2c0b99de9350b904ff541d68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to manipulate search engine rankings or redirect users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://cuisinescartier.ca/upload/editor/file/doxekedamomivunita.pdf In PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83af4e9dbd---67974839097.pdfIn PDF document text
    • http://ipceurope.com/assets/file/74302561803.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/17070203902.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/41036120191.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/60988090798.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/2d074764a373a58c4dc7596ad50a3856/xerotudon.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a047676c491---livobaxoxelo.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf94a9cde79---86406959873.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/91103587190.pdfIn PDF document text
    • http://newfieldclassof1982.com/clients/6/69/69e49ffade321d977af769e13f9f004b/File/seripumagowuj.pdfIn PDF document text
    • http://halaljones.com/uploads/files/guselevoligonirikot.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c5538302d---1997461930.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/setogapewegoz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c6b618efe---marivi.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/74438247015.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/v1av5ne5t64akurocscn3od362/wapugomapewutibuwelexu.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/7553jp7lrhpdpqma4sftuokfk1/76142955009.pdfIn PDF document text
    • http://patroha.hu/file/45939626189.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/xedata.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d4312a472---85861976600.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/44287957533.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86f48b3869---jokorawurav.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/117a2f0c095d49fbc1fe9e1634362915/tixusujeredugaloxupat.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/53778356588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=can+you+solder+brass+to+stainless+steelPDF 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_off0000c8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BA 10628 bytes
SHA-256: 8e355b30507015046a314d28d32b756bdce84beecc15eb34ed1fc40bba09870a
font_02_sfnt_off0000f934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 16504 bytes
SHA-256: 04de9d07fbd150a8b5b6338b0513e2bbe3c54b93d76843128fdc8958a62ee76e