Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ac20b64fae9522…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 22:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 94dd8cdbfef6b54f9df83c33b30f153e SHA-1: c22ec811f22a707b4e2700a926f41e895c2d6e07 SHA-256: 30ac20b64fae9522d18b79a6e55d701b2f531e9c60a05defd71dfd755a624ccd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common tactic for distributing further payloads or leading users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://synerhu.ru/uplcv?utm_term=new+cheat+ml+2020 PDF link annotation
    • http://teresachild.com/upload/files/kojipaxavo.pdfIn PDF document text
    • https://kimansion.com/uploads/file/lisogikotifuvivat.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c97758a1f5a1438a2f46fb8f0851cb95/dazesagu.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/rolifukabefujov.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/wijuxiwizalimikobabo.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/75f94112a02e951447914cd0d82aecb2/fawirivufib.pdfIn PDF document text
    • https://lanegarrett.net/userfiles/file/vuvasifewelu.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/sozexabebekedepugux.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/72940603165.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/88654807321.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/botexewojamofuvizalozit.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/rokiju.pdfIn PDF document text
    • https://eravikulamnationalpark.org/ckfinder/userfiles/files/miwitedatu.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613af5a90fb44---34076946730.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b411c77535---31312281192.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/70535964425.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/wutebike.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/14547947297.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/nobegurik.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab9672b466---verowopefodowururu.pdfIn PDF document text
    • https://ratoempat.com/contents/files/lafabusuvepofasux.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d9760bd3e8---rododaretujakamasogagaf.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/jusukokode.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1f09948d0---72451931417.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_off0000b2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D4 14716 bytes
SHA-256: db517383964520446931d49a82818ff5bd54b5e96aed65d97f4f8d8bd75a1f99
font_01_sfnt_off0000d812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 10216 bytes
SHA-256: 8899471efb2c65077755496c8080d055b700167a3b18bbb96b7e6360f0184bd9
font_02_sfnt_off0000ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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