Malicious PDF — malware analysis report

Static analysis result for SHA-256 278fb32f7e4d3746…

MALICIOUS

PDF

91.2 KB Created: 2021-07-15 17:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 926b720f583b75747a15ecc085311405 SHA-1: 70fc3174b3eec20e6ca74d302b1cd215f27da71e SHA-256: 278fb32f7e4d3746b262ae9d326273958d57282bfe497ade672b7c09f5fbb19c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm directing users to various external websites, some of which are hosted on compromised WordPress installations. The presence of multiple links and the use of UTM parameters suggest an attempt to lure users to potentially malicious sites for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://nomylo.ru/uplcv?utm_term=music+equalizer+for+pc PDF link annotation
    • http://jinanxintiandi.com/userfiles/files/nuwitot.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1743d1a1c---30405934607.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6b46ef916---13395259082.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/10afefecb7110532e995e86eddcc60c9/39956994683.pdfIn PDF document text
    • http://rsst77.ru/upload/files/mifeverakitopepapujixajoz.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e1eb09dee---mukutizaxijusinu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cb14012a857---zuvinup.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dea84c7ae---96709624730.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6bb0a5d0c---fuximigedikezapevadoz.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096688c13446---27503470534.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210613024917.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/0ad6ac8391ac095347d94aab2f16fae8/letagamufunajolok.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/nomunaxexolinilitepif.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609832591c579---rusomekapapupumiv.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd0f6446c4---nunolumajugogoxedoni.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160846d9f932a5---79485872307.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d7c999339---10500408108.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/jixobe.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021052900470967.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/69070772778.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/mfengldvnf3nl3jq43j17dli05/7902375897.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/4589344762.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/1c738842a32848460038c35e7db18c03/69413264290.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606feb21184b4---40763970584.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 17076 bytes
SHA-256: 2455b23360de1a289d6234680a51fd46eca5151c71f9cc15a1f254bf9ee4b102
font_01_sfnt_off00012f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001477d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477D 10572 bytes
SHA-256: 691732d9a7db5e8328102bd4c84f43cca381801dcb2e178388e9d0fafa236f6a

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