Malicious PDF — malware analysis report

Static analysis result for SHA-256 0630fa48c48ed2db…

MALICIOUS

PDF

86.9 KB Created: 2021-09-06 09:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 83d346caf15c3731d6b9121cadfd79f9 SHA-1: 6732eca96ddb6dbd99c264d0270bda1395824a55 SHA-256: 0630fa48c48ed2dba0e43f65ab92a8273a8f3a9dd64e6f7417b6785fae468e56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jolanyee.com/upload/files/202109011058408622.pdf In PDF document text
    • http://supermarketdv.ru/files/file/33738387924.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/ralejifobifore.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/pitukebipod.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/cabb46f898cf67eb8dda52091199f79b/xibukirepaponi.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/62254cd9c706ea710715ddc8988dd570/bulemer.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/mugire.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/manovodoromobalajazoka.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/biperosere.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/75603186970.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/bojujovomozunuxebas.pdfIn PDF document text
    • http://sciattella.net/images/file/tixilipukezogokapadijofiz.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/60c9c78dffcfe408b144771806ea8a1d/15275899825.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dbf81a2dff9---92621632695.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/7eb30afa7460e71a232731932f604955/62157139885.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/e9js49h05s0cst9ui7iltqv9uk/purarono.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/467746e89bb4ceabd17fc6b2a665d4ae/88160142990.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/mozupodatelewaxuzojizej.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/fdt9ktb9hlrtql72oe1pa2ru28/vanunemozepanip.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/f15a4ce4f23df3adfbc9be09c4bd089d/xosalorefap.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9f714039654d1f96ca66ccb16e23258f/rezewedojapigufe.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/xesovobulelil.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/58516955610.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3b7b7565f---sapubakazapunimevufiv.pdfIn PDF document text
    • http://cristalensi.com/public/File/tiboxojipogiluwimonub.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/56920256145.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb62b89c65---kupipomem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=candidiasis+intestinal+pediatria+pdfPDF 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_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 20508 bytes
SHA-256: cebaa4699733d93a7458df4201e097c01cc6059cace6594484457fb70916e9b9
font_01_sfnt_off00011c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001347e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347E 10404 bytes
SHA-256: 596d0b14061a4183c0a509e2f10ad499953a198bc16c068b91096cc664b38807