Malicious PDF — malware analysis report

Static analysis result for SHA-256 469c3fa8ccc0eb25…

MALICIOUS

PDF

89.2 KB Created: 2021-06-29 00:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c4e584db4efb6982f1abca9ff0ae5ea7 SHA-1: 2810bf2dab02f3305a3a3d45469289750f65447f SHA-256: 469c3fa8ccc0eb25a6f5c4cf22a07d938e9fe8f5f698861a87a7d97d16ecf172
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload storage locations and disposable hosting sites. The presence of numerous embedded URLs, many pointing to potentially malicious content, supports the conclusion that this document is designed to lead users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c7289d3aba37ea2ae26c82b090f6eb8/85586769348.pdf In PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4614ade4a0---xetalimagewapuxozadewa.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/24e20ea55ede69cc0d1125964942c008/98909528205.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b73f1e14af---13850888298.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/vamomejedotonarosetaba.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/86572862822.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/78b1f848ede3efb90025f7051481d251/surinugezebib.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/bojunipis.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/f660ecebd18aa1359a733cbb9bf26f7d/58361427813.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3636ab40fa---79542523526.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753b393ebc3---piwetupun.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/89994049492.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/zerupezemovobin.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/40753118438.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/30753297755.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/13871148954.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc3264e5fe---87135849772.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1623546981.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/vijixawofuxesavo.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/pujof.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be92e7b7fef---82083147211.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/kegoxazar.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/kutedev.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ea98c4d369fd422e2b1551b0b53120b1/porefogitebolagidu.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/a8ffaa8d828edbe547ea5bdd5ac2f841/jazinifepe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pinched+siatic+nervePDF 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_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 10368 bytes
SHA-256: ffad9f1b56a2386a128be631b6ea5a3ad6b8fd614286f6d3f96eef7ddb7ff2a0
font_02_sfnt_off00012a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A53 17428 bytes
SHA-256: 35129a943c348db251fe605b127b4407743b4f084156866ac45bde17cdf2c81e

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