Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabb2e652b75c534…

MALICIOUS

PDF

71.4 KB Created: 2021-02-17 16:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9974a5901ebbc9c9044f39527a68e37e SHA-1: f34f82da2aa1bcfd76692ce175eb8c09a7a9be6b SHA-256: cabb2e652b75c534831216fe36315406801d3b25864364159fc5b9241c3e7c29
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains, suggests a phishing or link-farming operation. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://leonvi.ru/aws?utm_term=hunger+games+mockingjay+2+filming+locations PDF link annotation
    • http://dezlice.ru/mavekulok7mbn.pdfIn PDF document text
    • http://jisotevujemi.22web.org/infamous_festival_of_blood_trophy_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426696/normal_5fe8243dc7826.pdfIn PDF document text
    • http://mon-cmb.best/laregafenibogitidosolari4aa.pdfIn PDF document text
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/15f3410f4.pdfIn PDF document text
    • http://vwwv-avito.online/33755381850aypob.pdfIn PDF document text
    • http://vunekopewode.22web.org/tommee_tippee_manual_breast_pump_target.pdfIn PDF document text
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/kugaduti-bakizuzix-lorokabaxem.pdfIn PDF document text
    • http://ccckkkkk.space/assignment_of_benefits_florida_formvlv64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxunexuxulaxed.epizy.com/pepukivajimufobuselevufa.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/58035175198.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/girituduji.pdfIn PDF document text
    • http://fusupufe.epizy.com/website_templates_hd_images.pdfIn PDF document text
    • http://jasigobup.epizy.com/64443000714.pdfIn PDF document text
    • http://bumojito.rf.gd/marble_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/find_the_camel_alzheimer_s_answer.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_off0000daad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAD 5536 bytes
SHA-256: 9bf56c8c9421abc81ece4d69f70c2aa805b443e9d6be1762b15b071cfece7b23
font_01_sfnt_off0000ed89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 10424 bytes
SHA-256: 83ca31ff4444d2ad5543b43ec1ebbebbba1a0dac11a4c9aaaa127e3f7f0c6dd5

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