Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee57c8531f5ffbf…

MALICIOUS

PDF

123.5 KB Created: 2021-09-06 01:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aa1e67ddb1fcfe3d924ab3cf6cd92b40 SHA-1: f9a7f785321b044a4df4c65aa4f51e6bf433d5e9 SHA-256: 7ee57c8531f5ffbff6ec73367ae250a2a8c385ffe16544c2e7dcc20749c0bf8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous URLs that form a link farm, many pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://huntic.ru/uplcv?utm_term=shree+ganesh+mantra+in+telugu+pdf PDF link annotation
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160f06b333a8c4---nomozijaxegoludanadozek.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/qaskh9sgt1b8at6boia801sl7u/38094633478.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/seputunudomuzexolivuwuvaj.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9059c34f17---girezorulowo.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/eqdvea7amp95tj0ogk4roekro4/luxenabojoniludi.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/21244922384.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/cfg4n3og97udkrq8rs191t2mo6/15006065607.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/buwizogalajupibuvugono.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/70375466469.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4185abdd3f---1253124878.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/bojije.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/73c1cc214bec51c09ed1a2f370c8fbd6/pixokifasopo.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16087168876b7d---wenusoke.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16081cfaa94276---277100129.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/87856967167.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161292f56d8353---vudemutanafudojirafovu.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/panidu.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087df720b39e---60139488566.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/02f5b0b8b731cd62ef646cbed171364f/nalotixevinoxujimasob.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/57207013646.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/53867641141.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/30ac95bdaa26952369d4d689bfa0f403/roluvusupoxerego.pdfIn PDF document text
    • https://aedwea.com/upload/foto/vugasevedebapizetusatoled.pdfIn PDF document text
    • http://nhakhoauytinhaiphong.com/upload/files/jusanapopupuvuvakixaza.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b85c4bcc19---kajexiwofaragulukefonebib.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_off00016f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000187a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187A4 11000 bytes
SHA-256: a06d96176e83ade818426a7482fee7bcc96c92c3f3bb556195bacee392783bf8
font_02_sfnt_off0001a0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0C2 24828 bytes
SHA-256: 78377135ca3c08b4b1729b1536065670b43033df5c2dce2fe19221093ee2ca19