Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2459f6ea6a98db0…

MALICIOUS

PDF

89.6 KB Created: 2021-02-17 05:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 258a129e3bca74d2126756a6c4bdd0d8 SHA-1: 96a8fce639752a3f1ad0d9018b047b68484c2d07 SHA-256: e2459f6ea6a98db0e3927585cae6b3d6a8e93f8a00db32581a1c58c42e92ad64
176 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'jottigo.ru' suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/123?utm_term=husky+20+gallon+air+compressor+replacement+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410988/normal_5fdf1f9510fd0.pdfIn PDF document text
    • https://mozakemu.weebly.com/uploads/1/3/0/7/130738716/3265022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fceff74b51e7.pdfIn PDF document text
    • http://dk-inc.xyz/ar_camera_apk_mod9ozzh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_5fe94abb6b3ba.pdfIn PDF document text
    • https://wadapunefivuda.weebly.com/uploads/1/3/4/3/134307948/borate.pdfIn PDF document text
    • https://jarowezib.weebly.com/uploads/1/3/0/8/130813985/4769333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_600be1102c92a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_600cc85fdd015.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/tifuwuw/xigifonizadafeke.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/format_authorization_letter_process_documents.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/alternative_to_android_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/67526047244.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_off000119b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B8 5656 bytes
SHA-256: 6106ff0399f190a7caf4d4b5e476bd40145ad4c148b312f317046a3292de22a0
font_01_sfnt_off00012cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF5 12720 bytes
SHA-256: b0248ea87d27f0a71be4c9c3ccec8c28456a31dda62bf5fdced4a6dc82968bd6

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