Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f221f2c787112d…

MALICIOUS

PDF

96.4 KB Created: 2021-07-02 16:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f929ba7b338a3943c97aa4e31339291f SHA-1: 498f4bff09f7a9b13171199a00f564765a2ac3b5 SHA-256: 01f221f2c787112d34cbb49543f5b84a63312899d83cea303d86989adc6bd795
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm with multiple URLs hosted on compromised CMS uploads and disposable hosting, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/b728d026b875f9901b5cce0a4e6566a7/zutejolumi.pdf In PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/pedizopebunovoguketov.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/kufetumuxebinigikojer.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/vewovugibepifejabajipum.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f02adcabcaa265b6da4fc87102b2c39e/wiwajenabojuna.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/fa0107a126c7a4558e91098af45de1af/35839887996.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160718f6ce2840---tawapuwitakalumu.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/dc1f6beafcba4ead3744ca95134218ec/86955534595.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090dd5347cfd---32241668275.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/6562085882.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/livuveriruwumo.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c1b61620065cd3c6203a245bc94df20f/dudori.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3c6e5b6d6---12768633600.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/56675166779.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/efad1e0096f61721b6e7bd1364b7b234/puxufasakufukazuvisuri.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/154a18e4ad27d7422dec2b051e9fb062/figonovepesopovazivonu.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a567999d3db---wixejatenaje.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/cd22ded7c51968eeab130a8de3cf37fb/64443903281.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/datenufosiviroxudatesasol.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/brvkbv09mrs3h2nqpcs27l6gfo/26025644949.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/jvklqs5p5hgml205p085i1nr4l/42583696114.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/0uc1262rvfpg8he3cebivi3rb0/sepamitofemigobawefa.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83dcd952d---kibopep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=spiced+date+and+walnut+cakePDF 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_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d
font_01_sfnt_off00010976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10976 1824 bytes
SHA-256: 065c7a4f11f9e75f6e8b37807bc82b370f7b2846456f0b3b832c619392bb01b8
font_02_sfnt_off00011208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11208 10472 bytes
SHA-256: 220c4677bc091f95713c683a4e759ccd0c4f183b5ed8b15b9bee2bc44c7ae885
font_03_sfnt_off00012a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001421b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421B 18056 bytes
SHA-256: 908c69d606a2b780bb4d44f22701762a0351fb55d897a3e1b05622bd917b48cd

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