Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d0d4f3fd641cc6…

MALICIOUS

PDF

88.7 KB Created: 2021-09-08 05:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6d676675e8d4ff2752cd790aec152f8a SHA-1: 519367e6f01180ff75c3133298d0880af4ab2961 SHA-256: 79d0d4f3fd641cc6ed0678efe598be0c812b363c394e2b05911fcfb079c28cb1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3621

Heuristics 5

  • 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
  • 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://atiksigorta.com/files/30513274297.pdf In PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ecf977f36---86669785199.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6fb8df21f2560822f7e05080789becf8/lakafazabevuvololasi.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/33410007444.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160983bd66fe04---37601142513.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/zifagudoxajidabiparerid.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/806dfe2e2ee5ddba78f3d56142f6a526/96163476218.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/96770566627.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/219456a573c3c4415e5f7c8b5b13115e/8754979466.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/tiburamedinomak.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/89455854296.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b013d0124---purodisufekidunikil.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946b7bc3578---49496343347.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/27953735791.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/jaxar.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/dosoridixokuwur.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/30547252269.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/fajofiwuluxigutulaj.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4d6983ffb---rikesonunateg.pdfIn PDF document text
    • http://resheto.ru/users_images//fck/file/62161325055.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c9ba7c13d---kujaragoge.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160aa065131d0e---38758171990.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/fozugazavop.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/0754faea9932ac64d137ebaed5768243/kazudelimifajesigilur.pdfIn PDF document text
    • http://cycling-software.com/files/file/96451300976.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=manuale+cronotermostato+bticino+n4448PDF link annotation
    • 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_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 21652 bytes
SHA-256: ae09ec65d6b98e8251f9616563b9745cf6a02a0c15477dff497d0b3cbc5ce4ae
font_01_sfnt_off00013640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13640 10912 bytes
SHA-256: b33ec4d7f873f466e56b16ca9e4472966a219781b94d803b7f19dc46672a7b7e
font_02_sfnt_off00014f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1