Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e1b62d4b18b917…

MALICIOUS

PDF

91.5 KB Created: 2021-07-30 14:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 93940176e1ae8a8d4ca882d185569413 SHA-1: 6a5748fdf42357250d5948f298c982a6204cb447 SHA-256: f2e1b62d4b18b917f37954ece3587a8af085263fa6e266fec3fed9e378dced5c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e929683e6---xijodufosomamu.pdf In PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7056807ddf---voxenevupev.pdfIn PDF document text
    • http://master-br.ru/img/file/71054865535.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/deduboxugonudolunude.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa793abf7bb---dixetunu.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/fijomagenirasa.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f772364c3c038e268e1e7e8d8691f84b/65695002860.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/70740d1c78b9c92f53e508504fcc5099/26320846408.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/ev55oku77v0ltbfb84k5abj94m/42914216791.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/psjhim996hn9pp5npo68aukj7s/36341581774.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b818788143---9979462493.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/mabepafepixanudi.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d3dfb4e94---fivok.pdfIn PDF document text
    • https://dm288.com/slicice/file/pexaxoke.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/mobofabuluzul.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/xazomusaxasolaragiteta.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad32ec30ded---65987104410.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/dizev.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/zepikutirijirufukivozuna.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/47104754354.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/88797944024.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/450dcaff7c9e1422ada93070ceba5636/pinozuxitotenimor.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/farabexesu.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/7d63e9416743c77fdbf56489f1e84705/91464559327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=writing+practice+for+grade+2+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_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 17220 bytes
SHA-256: 3b006a91c8ac2e263bcfbd57b010d8ec01ac186ddd94a084b13eb723afab0e89
font_01_sfnt_off00012ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 10696 bytes
SHA-256: cc334a315bd6b98d596859419ef7d872a1ada497adc620862d003deee26862d6
font_02_sfnt_off00014760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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