Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd8e126787fad67…

MALICIOUS

PDF

98.4 KB Created: 2021-07-14 01:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a1ddb143b7e14cbf931a3d029c4e493a SHA-1: 7f85ef3defd2d40dba0aeb15f1ef848205fc1865 SHA-256: fdd8e126787fad67dd36ce4053a150c1bc90d31921cad02c39cb3fb62b89a203
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

Heuristics 6

  • 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
  • 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://bangvetthuong.com/luutru/files/vosenebironijizuzome.pdf In PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/s928vj807u5npqkc306p1grdu2/jipitenujix.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160834c214b959---jewufi.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098baf954360---nedevojuleb.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/11026665988.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/22189846711.pdfIn PDF document text
    • https://ive-cal.it/file/kezitexig.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/77508689865.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/50894758337.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e914ead4298---mefotasodizi.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/xarusibexag.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c0166167b---88270780963.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/gaxizavaxexobo.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/64038909014.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/7701104015.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/dbcbq9r63hf9e2k5dcrh4jarmi/91510854302.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/neguwoziduwadivaj.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/38227284106.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9ed133612---kugele.pdfIn PDF document text
    • http://accessoriesunlimitedinc.net/catalog/file/kopivuvuwajaxewosinut.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609675f3dc3c4---7197440572.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/g0m1k5fm2m0i6c3tjplsg1lp03/jawedewaratazowad.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a628b80d8b---detusa.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d500b8278ce---vinanovusibipewijas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+level+up+fast+in+ro+ghoul+2020PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 18608 bytes
SHA-256: 5c481b7f65eab5a9d4a3cffa38f95a448325367cc7c0271e024e232a0d5c2b1e
font_01_sfnt_off00010bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FC 1728 bytes
SHA-256: 3e54697433f258519e59b5d4193970bd3702f67e639bb31f2dfcde737eb7fc9e
font_03_sfnt_off00012c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C25 19372 bytes
SHA-256: aa5176a497a8fe9104a67fdcf7dc8d7ac9b0551ea42d31662f6f881f7b2c57e2
font_04_sfnt_off00015f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F81 11120 bytes
SHA-256: c6ec36815e4dddf300161af3ab44a34fc318f8b21b2a1c54c0bd9f81b56df922

Open this report in the interactive analyzer, or submit your own file for analysis.