Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e1681489e46a30…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 07:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 05ff252548bb43942351b7d4c931136a SHA-1: 42297005c2f92f25f28f84c80d5db5df7e7dfa30 SHA-256: 06e1681489e46a30a6ec3be66f62d3f324f610313f8a159c6863e20f8a4d6b0b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/2jntv34vs7uiu7fbp49ok9grt3/dodinowibaboxekawowabara.pdf In PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/473060b2cded5d0e1e772f6665dee8c3/53597922045.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/83707681125.pdfIn PDF document text
    • http://ned.ru/uploads/files/78811227850.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/17543763450.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d837d6280---77622131837.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/72575908793.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed13df037a---zupesixaze.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16106c483978b9---gutabuv.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/widujibekar.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/duruvamamu.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/lenamena.pdfIn PDF document text
    • https://vietnamwelder.vn/uploads/news_file/10323894958.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/13742360172.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/vazupimigatewewewibadufen.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6223fbe237---ruzigegewemovili.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/mutigovisoxorilim.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba66e072344---25314024631.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16084e42e33a8d---ridedejigonimesozoxuvi.pdfIn PDF document text
    • http://alvirne88.com/clients/71477/File/zotowi.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/24486923334.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/ff942e10dafff766aea189f145e3f592/13218970504.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/5616376377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=original+hebrew+bible+english+translation+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 19112 bytes
SHA-256: 5dae58de468882389eb9dd145015c1ece279155b018745aa93cbbb553f84fb03
font_02_sfnt_off000114fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FA 11028 bytes
SHA-256: c0fa708af3a76edda1063287f1ba81d056bf193d47992c4b305db25ba4773fd7