Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7a4fc50249f474…

MALICIOUS

PDF

124.5 KB Created: 2020-12-02 00:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 10b9fb15584cde9800803b896b5be341 SHA-1: 8bf37c314ae065ba3454117165804e1c5ace9d8b SHA-256: ee7a4fc50249f4746013753d6471cb3c53f69243db21f0c202a4ad5ad456f834
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://cctraff.ru/aws?utm_term=lucid+dreams+piano+sheet+roblox'. Additionally, it hosts a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=lucid+dreams+piano+sheet+roblox In PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/1192384.pdfIn PDF document text
    • https://nagopajasire.weebly.com/uploads/1/3/4/3/134311949/woriwa_dirilosozunog.pdfIn PDF document text
    • https://liwujozixo.weebly.com/uploads/1/3/4/4/134497145/b2afe4.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/sowirutelevolur/rabazurijagivujufavuzose.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/betternet_pro_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8cb75d-43aa-4124-b00c-c901e4125a99/baseball_card_minimum_size.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/90756271909.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0146bc819f1cf49f0b16/1606287687491/best_onion_sports_articles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfb59fe-ba07-4414-8c88-8022f773a0e6/50169506448.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/49694432388.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e2e173fb5383b98b0d7/1606372910480/present_tense_of_ser_and_estar_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27eb48ef7301f8b1ae02f/t/5fc559db3c6ccf69f31129ff/1606769124152/insta_lean_pills.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_off0001574d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1574D 10200 bytes
SHA-256: 2305e93ed7cf99422f502d27f34ad628da9145b878330716c72b30b103d1d346
font_01_sfnt_off00017945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17945 5460 bytes
SHA-256: 5da260cd1aa9f69472767581323e64e60439620455810b01f7c6173ea8d25aac
font_02_sfnt_off00018ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BA0 2140 bytes
SHA-256: 3eadf3ff1ae85f7a2dd8be852d633ca148c1d24200a16cbd4325889adc5789c4
font_03_sfnt_off0001957a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1957A 21488 bytes
SHA-256: f5ef59fed5c16a12f736c4d953b922ee43a0111739c23036e0d1b4a690a6006c
font_04_sfnt_off0001cedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEDD 16076 bytes
SHA-256: f530883c3cc306000364b4084cae578ea9cd0c162069bd297b59107afb5012c9

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