Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a70c70b4ae1c956…

MALICIOUS

PDF

71.1 KB Created: 2021-04-01 05:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ce92e4bbc5ff2d8d33dab6867e72addf SHA-1: 232891b8557166364def845ed5181902c6478365 SHA-256: 7a70c70b4ae1c956c809242cb1d98e3e8b5573d5872e142097651d2b58693669
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text that appears to be related to a chart, aligning with the embedded URI's apparent lure. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=0-100+chart+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385635/normal_603b497343d33.pdfIn PDF document text
    • http://goodnatural.space/xivuvezigcprj0.pdfIn PDF document text
    • http://bupetud.xyz/89448927289xneb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_6005297aad714.pdfIn PDF document text
    • https://cdn.sqhk.co/mitajaso/7gj8BvM/bed_wars_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478137/normal_5fe1c1fc54858.pdfIn PDF document text
    • https://cdn.sqhk.co/sivumazudi/sybjfhb/bet365_account_hacked.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/13450071771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482645/normal_6047fddf91f50.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/43633455204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fc8dd70a4419.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/ggjcNja/ruzatozizar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/alfa_romeo_2000_gtv_performance_parts.pdfIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/bujilekalojibonemi.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/wabetamedewuxesuzuse.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/honeywell_home_and_building_technologies.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/cdc_gbs_positive_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac9b486-0218-403e-abac-8cf355ec0551/vudugilatewefijagimujag.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/xitolukusewotuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0be1d6f-3140-49be-a89f-e22174bd9d48/is_california_roll_made_with_real_crab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b84a30-ae5d-4aca-ac5e-51f1eb926319/takosisop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fbf89f-6e9a-45fa-8d20-9db3fceb64ce/html_and_css_book_free_download.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/skills_practice_workbook_answers_algebra_1.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_off0000d657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD657 5164 bytes
SHA-256: d2258a233c8745f7afad99a63d6a7c5ba7f05b2ce18ca50717f67d39694f3c3e
font_01_sfnt_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 11592 bytes
SHA-256: 9908c725ae3af86d73d1e56d062a9cb1039b440e934d2c0804988bc7282124a1

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