Malicious PDF — malware analysis report

Static analysis result for SHA-256 a209b71699e87374…

MALICIOUS

PDF

63.3 KB Created: 2021-02-18 09:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 638f040409194e4d1318a9509ba0bd83 SHA-1: 70ce58a7e7946bf9eadc00951927727d39dda0c5 SHA-256: a209b71699e87374739725e05ed91e7f946e2833ff31b9ebe1d957d1c3d94389
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URLs suggest an attempt to redirect users to potentially harmful sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=skylanders+giants+trophy+guide In PDF document text
    • http://menformula.xyz/sadadulavoxesutileforatofk07ap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_6020d25caac22.pdfIn PDF document text
    • http://moneyindia.site/valoracion_del_recien_nacido_apgar5a8ld.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418184/normal_6002377a4a0cb.pdfIn PDF document text
    • http://ultra0.space/46816764550yokw6.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/bigogowexidaremaba2zb4.pdfIn PDF document text
    • https://megefutuw.weebly.com/uploads/1/3/0/9/130969536/xevapinidi-zilab-kuzubo.pdfIn PDF document text
    • https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/sinuror-mexezab.pdfIn PDF document text
    • http://dithetsen.xyz/mercury_7.5_thunderbolt_weightukbvu.pdfIn PDF document text
    • http://antonioit.fun/65496889017nqqhr.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/leributafa/kofolabiluguboluwukafaruf.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/tunibedejijujipidumab.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/reported_speech_examples_for_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/amazon_us_app.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_off0000bc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3A 5492 bytes
SHA-256: b1b94eb58e0e152ee9839b6b06163e9e1832654c664c573cb2e0e9117aedb16c
font_01_sfnt_off0000cee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE8 9856 bytes
SHA-256: 6b1d68b5d6591a29b706ce9b6cd4fbb3fa61aa77a48c3e43c355c8e8e3a678ec

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