Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb02d21b9f56077a…

MALICIOUS

PDF

74.7 KB Created: 2021-04-01 17:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cf210bb4f36fa7d47c712c5c79c6521d SHA-1: bd22a8626bd64f4ee093a3371902307a39754f49 SHA-256: cb02d21b9f56077a2ff6cc262f809fe82a647b32fbeec390b58ce7a87aaeedc7
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly hosting, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+adjust+height+on+fisher+price+jumperoo PDF link annotation
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/rawanigafisuv.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/8th_grade_weekly_spelling_words.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5fed407b905e8.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/arabic_to_english_words.pdfIn PDF document text
    • https://muragifenujokuf.weebly.com/uploads/1/3/1/1/131164382/kujowutu.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/wadejopuvodupa-nikilolobaf-tezumifimomapa-ruximumop.pdfIn PDF document text
    • https://gapuromediwav.weebly.com/uploads/1/3/0/8/130814643/853099.pdfIn PDF document text
    • http://nokilibetajew.mywebcommunity.org/27388646496.pdfIn PDF document text
    • http://mojenisijita.mywebcommunity.org/the_lover_marguerite_duras_epub_download.pdfIn PDF document text
    • http://zeludupixejufi.medianewsonline.com/business_plan_for_app_development.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/85785351909.pdfIn PDF document text
    • https://rixeludabigadak.weebly.com/uploads/1/3/0/9/130969597/xamelobok_bapivezix_gelebojibuvu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365627/normal_5ff37ec4674ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485157/normal_5fc8ba4190a07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzolegogi.atwebpages.com/42637733558.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_6e8accb4c9ff46a898063aedb5cd1c74.pdf?index=trueIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_172d75a0bda3460ba7fb642e87ec11ee.pdf?index=trueIn PDF document text
    • https://cabae152-0d18-4cc7-9545-8711a89e332e.filesusr.com/ugd/607e04_8adc4e8fab6147788ffef5c1b7f3038a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE677 5668 bytes
SHA-256: 642ff71d8d74ff36f3e3fb421c3208db0b6748491d85d33d4c565502de19c4dd
font_01_sfnt_off0000f9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 10468 bytes
SHA-256: f066b91587000d8a878904e3d9f5a67b18c4cec4e31eac830ba1db914aa7bab7

Open this report in the interactive analyzer, or submit your own file for analysis.