Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7dd085e9c4eeeb…

MALICIOUS

PDF

68.8 KB Created: 2021-09-28 14:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2896527fae255df6d37d282df94c5c30 SHA-1: 9a89d245ef27fde462d7dbcee31d3e9b6da1f973 SHA-256: 2a7dd085e9c4eeeb94fd4867c2fc817b981242bf9cd9ed2115c5654b64fc6d9a
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs likely lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=skyview+lite+android PDF link annotation
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343cd41b675---pivizes.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/bafibevotodidufubejidufa.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/72081567496.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/76042989239.pdfIn PDF document text
    • https://susta.vn/userfiles/file/ziwaden.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/81786587342.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144bae09056e---15531063420.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/85654762157.pdfIn PDF document text
    • http://josquin-capella.de/download/lurigiboxunukon.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/tunuwositegizu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/b2a02123f543253aeae1d38382a203bc/nunuxuvuzogifonaginisomaj.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/taxabawovazopororajov.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/tigolonimanurilovif.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/gugap.pdfIn PDF document text
    • https://ww170002.linebot.net/upfile/files/20210923150641.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/favokomuxetarera.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/tomugutikizuwuvuvupuka.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/moxaxujuturadawolowe.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/79312192362.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/mapixiziked.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/95266077664.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/29537031692.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/zazevutekumibinofelapop.pdfIn PDF document text
    • https://matratva.in/userfiles/file/kosoxewizogu.pdfIn PDF document text
    • https://safetyhanoi.baohohoanglong.com/userfiles/file/paduzeboxalofez.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_off0000af34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF34 10508 bytes
SHA-256: 1f3084e7960ba2584f32c142a33a576341666abf0d3cc1f2161a2b23aa2b4d4d
font_01_sfnt_off0000c74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF60 16124 bytes
SHA-256: 976f841a87a2c8fdd60f2fc566461dd3670aa639ce778bc85baa387a7a4a4020