Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7dbcf2dc5a44ca9…

MALICIOUS

PDF

79.2 KB Created: 2020-12-17 00:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 00a8b5871066c0cd99cb7e5b1d850b7b SHA-1: 220a4db581dea9b8bb5d956a88424307e5f4b362 SHA-256: c7dbcf2dc5a44ca9156dbf808b3d5c96c76bc69e317c6dff73cc48228f1c7296
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://traffset.ru/aws?utm_term=badland+brawl+game PDF link annotation
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/1816054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_5fa1b00b6541f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5fbf53614e503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_5f9b5e8cd389e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_5fb3647e46e56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f89322dcfdf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491148/normal_5fc4ba35db8d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5fb29ddb5ce43.pdfIn PDF document text
    • https://vefawotujetebab.weebly.com/uploads/1/3/4/6/134651081/417426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://static1.squarespace.com/static/5fc36d523dfdd95b60e52950/t/5fd0a0a45efba8153b27ecf8/1607508133086/top_fashion_star_model_salon_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144a93398ff7515307f21/t/5fc3d2e79d7936484002d815/1606669035847/javawobovozobif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59143fb-99f9-47ed-8a7a-0f6307386722/faribarotepad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ec41c8c74131432ae85/t/5fce9bb033343530ab9e0391/1607375793172/kebekolokapudikaraxagum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc011b424b06a7eb3fa7d30/t/5fc2c6dc7acac6192a1c294a/1606600414739/budynas-nisbett_shigleys_mechanical_engineering_design_8th_ed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce35f271251b5e49a08136/t/5fd6f0205b1f6f7539eb41f7/1607921704195/cloakroom_tickets_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5db0916f6d44b07e08f00/t/5fc97663ab0d1a26d95e6952/1607038563352/lejurutesejewarimi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2fa50db0542b884e61ec/t/5fd16765071bbc68801d2c19/1607559018007/online_shopping_website_design_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be661243-8050-482e-addc-c2fe3d9c78af/sixor.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08E 5248 bytes
SHA-256: 73f79c3487ef2881a64715d999fa2f25506e2663bd24faa95d4ca4c5422b2fd3
font_01_sfnt_off0000e260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE260 2092 bytes
SHA-256: 3c666fd8d82ec57f66cd85ad547d612659eb1efb880390a89b9aac84eaf433a5
font_02_sfnt_off0000eba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 11000 bytes
SHA-256: fd1c63dfa4a742dc3c6e7c7f8d56a6ac240514e1821d92800266ad56a832124a
font_03_sfnt_off000111a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 16288 bytes
SHA-256: b5048fe099508665718fb4f27980d69cd86fe8e7717a8d29f63a6ef27420756c
font_04_sfnt_off00012732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12732 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19