Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d6c6c58ff7e465…

MALICIOUS

PDF

183.2 KB Created: 2021-03-03 14:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b90d2ba079fff65406865de3c7731ecc SHA-1: a9e54bfd7da077bde5b814a2ef8907a3bd4579ea SHA-256: 46d6c6c58ff7e46547f65e7135734a31533216149a0608202af146076d2eb920
184 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links pointing to potentially malicious or disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to phishing sites or download further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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/strik?utm_term=can+i+watch+live+news+on+hulu In PDF document text
    • http://prizyivnik.ru/lab_report_abstract_example_physicswex1n.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/9469144.pdfIn PDF document text
    • http://strahauto.website/bill_of_exchange_act6waiv.pdfIn PDF document text
    • http://prequester.online/33713356478bbmzz.pdfIn PDF document text
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/favaziko.pdfIn PDF document text
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/xopimarexo-veradazakoji-peruwumezi.pdfIn PDF document text
    • http://gonakasuzoze.22web.org/29849739674.pdfIn PDF document text
    • https://jimekijan.weebly.com/uploads/1/3/2/8/132815057/dodobudale.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/3123481604.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/pradeep_fundamental_physics_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidotetunuxezi.epizy.com/gatexapiratoviraxajobolu.pdfIn PDF document text
    • http://piperopire.rf.gd/9376853060.pdfIn PDF document text
    • http://zowuxepalaget.epizy.com/zigivosanofuluse.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/86442057649.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28052 4848 bytes
SHA-256: 4d7b1a4e20d76fbfe83c37590c645a6bed393ea14196ad7c0d2c04de34850fe9
font_01_sfnt_off000290e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x290E4 12028 bytes
SHA-256: 6191c867b5f71fcf676315f2215e36444f7f28724fc347ad17e867a0e3d065f3
font_02_sfnt_off0002b8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8AB 16028 bytes
SHA-256: 13adf508137d8c465935a7a142060f5d940462760dc3fd3f5061e956d2f2222b

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