Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7d072098620f0d…

MALICIOUS

PDF

84.2 KB Created: 2021-07-05 09:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7aff6df523360f29a9bb470952f07bc7 SHA-1: 4ccd1176d81ac624c5a18fa6cfc3103c85ce7906 SHA-256: 7b7d072098620f0d9db41fb3d34342575cadb7f0784856f017fd3144d82d4294
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress upload directories. The presence of these links suggests an intent to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://queure.ru/uplcv?utm_term=the+warriors+ps2+iso PDF link annotation
    • http://wamer.org/userfiles/file/giwimeremokawepelilez.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///7732146939.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a310a3ba93f---soxogobiwosorezufero.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/01c606b7703de92116427daeff089b4b/78895180258.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/t722ebal7tqiosamg014v1uf2f/28398292036.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607685b057abf---16718995256.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/7da2fe252c10ca6de76a6f905bd5d819/tixasinivixu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c8c3b3e49---66266017635.pdfIn PDF document text
    • https://agermag.ro/mm/file/xirapexumejazali.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210613035442478434pma4xn3ojd4w.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a437678a5---58991011540.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/bazevifewasatirexozuwas.pdfIn PDF document text
    • http://brainerdhs71.com/clients/0/08/084bd9d902c6a1e3ee48703551c87841/File/35380213972.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/nakijemukurevituvoguvet.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/4d74pl3i5o4jjl21tajtji8rlf/fumuzefiranegepusetinose.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcea6d8efa---77474902866.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/35734123886.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/061c80f09bdbb5e76da0ea4cdf05b94a/43996607031.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/nusanekofadadetedap.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/30105849930.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/12416237358.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/adk09ratji6ahdpvk60gegba6d/zedavexenifum.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/gefanarosefuvalol.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/emeulmaof2vl2da8396emi0p9g/wezexuronupamir.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_off0000e6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC1 10268 bytes
SHA-256: 6e2dfa01182fe639310a465f78a68a819081774a18988ff84f1fcfc870019d62
font_02_sfnt_off0001161b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161B 17896 bytes
SHA-256: a4e53fe0603829363dbbb0ddce45f6ea4fe249bada2719a64d6f312202f07d47

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