Malicious PDF — malware analysis report

Static analysis result for SHA-256 12376de9df107d2d…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 07:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: adb68eccf74072935618e185f898f718 SHA-1: 747054586eb7e1bcca31a371b3442f002e4a08a3 SHA-256: 12376de9df107d2d4de84eb9307e1e755ec8a6d7d8fb3805c70c01cb7a7723fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple distinct hosts, some of which are compromised CMS uploads. The presence of numerous links on disposable hosting further suggests a malicious intent to distribute or redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://np-laser.com/upload_fck/file/2021-8-27/20210827161049409720.pdf In PDF document text
    • http://alvit-bk.ru/userfiles/file/mujebanewemavebovonawunuk.pdfIn PDF document text
    • http://faradbox.pl/files/file/raxudetu.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a21d50c8c---91830023082.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe67372492---zixubazewidazisonot.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/pkbg62mducvroltirqd7m2lu2k/pajojefekuxokuga.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/76741137232.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7bb3e5a4c---74973775366.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121b490af9f1---pipilabelonajinugi.pdfIn PDF document text
    • https://loyd.rs/images/file/kerawinevilop.pdfIn PDF document text
    • https://hsse.cl/files/6949790386.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/99482a3b9f2fde510466346224c82325/87753852954.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1610e879d2082e---biwefobozuxawezabepumel.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/fb2127684484f686b77f37343db84374/nuxusolunefajebifareku.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/38641724642.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/59015189790.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078528f2da01---kevujuxuzitasubogi.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/sarafolutesetud.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e82cf0c462---bilatogiwezadomobidejuxel.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/23945439024.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cd36f82d739---11881127984.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/tojegoz.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/bokanesoxe.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c527e20c36e---folamipobuwujizaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=little+fires+everywhere+book+club+questionsPDF 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_off0000e0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FF 17152 bytes
SHA-256: c086d4e0b8b71a92c608e9fd1a49294aad33b47c5931b780bbbe42c9c65220b2
font_01_sfnt_off00010d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0C 10972 bytes
SHA-256: 77f42e4eb79f173988a51ca3a5bf571a023360eb4c9e4215157f1795dec88a91
font_02_sfnt_off0001268f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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