Malicious PDF — malware analysis report

Static analysis result for SHA-256 feca73e8d1ec5f15…

MALICIOUS

PDF

83.2 KB Created: 2021-08-14 23:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f629dc1e7a3f989e1f1802bc2ba776ba SHA-1: a5d207160651dbd3070bcc329aa4d8a7d3bee11b SHA-256: feca73e8d1ec5f150d901232a57f3e0ec8ce2837c4399a966855adb83d647f99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute further malicious content. The presence of numerous URLs, many hosted on potentially compromised domains, indicates a phishing or scam campaign aiming to redirect users to malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c2aa8638010---39611120058.pdf In PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/sapawexuwojevepageba.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/a1ea71a9686ae7d79ff591e2eca084ec/rumobufoverinomovaluxak.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b9ea09b9cfe32cd355cc7cac3a11531/repatikabetosewifugodoxal.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f00a94e4a---40576132167.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/95355746078.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/xosikiruna.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/d50fdbb8ca4d8e81a8bacddc7800672e/babapofafukulipegimi.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085576e79819---lesokewolix.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/vixevafadajogigo.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/mapuzepumukipunarorob.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/ketefipemamiwavazetun.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f083a7beed---vumelegulatom.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/24781125656.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f8b54ca03c7308a46236a547801e6231/xikogizes.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/75840713975.pdfIn PDF document text
    • http://accronline.com/userfiles/file/57949044535.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/92085960524.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70aa69c806---16549013325.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e18bbd6a1---ligoguvikadoxo.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/fifuxijopebinupol.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/62278809896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=descargar+mitos+griegos+maria+angelidou+mobiPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/18429568280.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_off0000de6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 10956 bytes
SHA-256: 28ed9b258b9cfb5173c2da405e95fb904d0c182ec9ebec55d20fdc3271fbb5d9
font_02_sfnt_off00010fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB4 17648 bytes
SHA-256: d17e0f39c8a7ce645d6eb08899b2604875d4dd7e6487538874ab7806178b5b44

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