Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a27a28292d7739…

MALICIOUS

PDF

78.0 KB Created: 2021-03-18 13:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a0b970ac789f0f7f4f5ab12f676bdf50 SHA-1: 5a84e6db1bc68da30c31affba2ac63d4201aae87 SHA-256: 35a27a28292d77399045d608e4ef85ed10afd165eb78f0983556ee3b16a19b7e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for link farms and phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of external URIs and a link farm suggests the document is designed to redirect users to potentially malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=montel+williams+blender+recipes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496148/normal_5ff78139d6858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444852/normal_600ca2ed5e6ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475204/normal_600b706f6b80c.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/iijjbig/smart_connect_recharge_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/X3rfijU/where_the_crawdads_sing_book_club_guide.pdfIn PDF document text
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/jetezozetis_nuxafonevixid_zawogafabeju.pdfIn PDF document text
    • https://goresizusozal.weebly.com/uploads/1/3/4/5/134524816/9209570.pdfIn PDF document text
    • https://duxubekuzew.weebly.com/uploads/1/3/4/5/134506612/4751144.pdfIn PDF document text
    • https://cdn.sqhk.co/mojubemuwek/cGFgfhb/15390796892.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/hdibTZE/geometry_dash_subzero_full_version_apk_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_4607d33e56c742a5a12714f8b08e19c3.pdf?index=trueIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_ee58207cf2d646abbe31cef271d9207b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d034ad-e1f7-47ee-a830-f9bbf63638b0/89393664726.pdfIn PDF document text
    • https://5121d360-3808-4f61-aa44-d87cf2d9d428.filesusr.com/ugd/032e8a_4b77f76c8e844f41b7a842f978604442.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b8ae78-c685-46ac-96d6-9e05f4515caf/foximodi.pdfIn PDF document text
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_3cc942435a5d44d6be51234b31707eb3.pdf?index=trueIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_56ee3789768b49f3ae4c526266788444.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/najubu/71437098320.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/canva_cv_template_gratuit.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05C 5456 bytes
SHA-256: 64a4fd542f911c91f38b213a190295ebb8dc0559b0f2c41ef63bee3291c3a66b
font_01_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 11736 bytes
SHA-256: b0fb93b195e3504035e9df54d1fb2072f3cbe0b691b52595e2b205c061a56a68