Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b32cc5d7c289903…

MALICIOUS

PDF

96.1 KB Created: 2021-07-27 09:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5f5d6a632e1144f556cca2e7d8ae5204 SHA-1: d5af63b872805676c9c0ee06d4448248b132c85d SHA-256: 2b32cc5d7c28990333a97bcaadb2fea416ff86eeb06350688ba5ad8852d3020d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://jagamimpi.net/contents//files/21549596457.pdf In PDF document text
    • http://washburnhs64.com/clients/f/f7/f75dc469904bb25755ea64d7551c4a95/File/vebuwa.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/gi1727k5n918b15rpddropnmma/36889537379.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/ea59ea5203c9d7cef3f6569071b15f57/30575823694.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/5a9e0072088ea308c1812d27ed0c016a/wurulasemovoso.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecee0310a8---85689236393.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607abd1287bab---61687288098.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/934828509.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/77077989016.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/7cc53f32e4a8617109784dd3e3584d5d/nimoveromapenibumiwafapal.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609448c7ad5a3---gaxesigelodinemusel.pdfIn PDF document text
    • https://vieiras.pt/imagensprodutos/file/91994601778.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/53951975624.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094173849169---8057200569.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/bomuwu.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/79057701794.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/58512951468.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ccfc92d44a0---79268750926.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc32b2c69---90710248642.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/10ad8f7cacf8116a54b6ec965918c075/79615262281.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/sanuveralajoz.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/73582391434.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/nojuj.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/42363086256.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/fawakekemuxunajajolipeduz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=can%27t+remember+guided+access+passcodePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 11116 bytes
SHA-256: 9bff198f8d286f587850fc70867b756be82fe2d3b66ea573dd41d0f0a0ded02a
font_01_sfnt_off0001157f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 17236 bytes
SHA-256: e545458788a0b320d8405d81e4acb5b37482b91af5855fd91901eef0d9c32ce9
font_02_sfnt_off000142d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE1 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae