Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f5c319ea188da8…

MALICIOUS

PDF

86.8 KB Created: 2021-06-28 04:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 52e76ee7d73d70e6855c09eb04786db1 SHA-1: eb280885ac48d404c64223441ebad534264f419b SHA-256: 04f5c319ea188da8d304716d34359b60e6eaddb28b4bed8d37b869ed137cff2d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of 'utm_term' parameters in some URLs indicates tracking or redirection tactics, common in phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://irlanc.ru/uplcv?utm_term=beagle+good+for+apartment PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad59a3bc173---81317033560.pdfIn PDF document text
    • https://ahha.az/userfiles/file/tomugalopomure.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/mk4emnl526gpg8cabeevn71q8p/reput.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/rodeje.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/40a9f710f70b91c9d31d8f417229ddf7/fixolesidi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/l68cv1ad48j657hv8knnopf046/12023565491.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/qstmpquacqhclq6ldn5bq55avq/watofazo.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/fuzujeri.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/47285687855.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/dufop.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becbe296516---34739896592.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1438597c3c---76261318043.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210621114256.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16078c57fabc3d---95359821437.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/97957368180.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/d5930430f8a5490c1df1197a6a05574e/pagoxozaketapa.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806d16dd000---21817017952.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d0f7479b26dba237ea77dd50773a9d51/pajufolojanoxagejexuxidam.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8be3816f4d---38654684883.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/97e286c74671ec84c1627d7e31785b68/janifusexinodufigirone.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2a9d6751e2f975a178cf143b1364f25c/zufesa.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/fimowalobis.pdfIn PDF document text
    • 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_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DA 10632 bytes
SHA-256: a9a10009a22a105a3268a29f54e080744d79d4eccc71cd1422e0e0f174651101
font_02_sfnt_off000121f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F0 16972 bytes
SHA-256: cda0e5e4b1c2595eaaad7be876000284d2ffd597d9e0649099505bf3ab576519