Malicious PDF — malware analysis report

Static analysis result for SHA-256 5201eac8068ff4e3…

MALICIOUS

PDF

79.1 KB Created: 2021-03-26 11:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1531b39686c53e666f644aaccd00a5f3 SHA-1: 5314619a5ad3d5812c46cad0f1f55eea67a59898 SHA-256: 5201eac8068ff4e3601bc9823d0751d26feb1038ba3a19ff64ee0ec1ca152070
186 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 0.9996

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://fokemale.ru/123?utm_term=physics+graphs+of+motion+worksheets PDF link annotation
    • http://derilezin.sportsontheweb.net/geometric_algebra_physics.pdfIn PDF document text
    • https://wopuwidutava.weebly.com/uploads/1/3/5/3/135322166/sowewadu.pdfIn PDF document text
    • http://xitodefigatefuj.medianewsonline.com/39134919556.pdfIn PDF document text
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/paxirogubifipek-zedinexogovo-kexowo-sukorawiloxip.pdfIn PDF document text
    • https://fomexiterejetax.weebly.com/uploads/1/3/4/4/134435806/bf90909a89c.pdfIn PDF document text
    • https://kiruxujekan.weebly.com/uploads/1/3/2/7/132740547/3865708.pdfIn PDF document text
    • https://lekozeva.weebly.com/uploads/1/3/5/9/135964777/3c16512fb866c.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/wapuvavatemogewizumumasun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5fdc33a96acc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_6040676cad3be.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/savosorazo.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/7664474.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/7281727898.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_1320011eb79c403da43bda2f2c5f2aa8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/64570274905.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_b2b99d4c2f00426090791a0a3f6e0f46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/fawovigidanatevur.pdfIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_7f6b32628bf74a9684abde15bad6380c.pdf?index=trueIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_4197b8a38f4c48819f1b43afc0e3b144.pdf?index=trueIn PDF document text
    • http://zesafemumibow.myartsonline.com/cycling_cap_pattern_free.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_45c8f2a44c9f4a58a7716e1bfd0f24ae.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 5444 bytes
SHA-256: c89681ae614d1d30366e351b3f2c5fe4c86af622e8f5c88fc29b1dd3b0614dd6
font_01_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 10856 bytes
SHA-256: d3dfb0c750d51605f4ed8362c227b8ef768671e9be34e5f7186cf92c1451ab19
font_02_sfnt_off000120f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333